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Spiral galaxies NGC 1055 and NGC 1068 in the Whale - NGC 1055 and NGC 1068 spiral galaxies in Cetus - M77 (NGC 1068), bottom right: this active galaxy is a typical example of a galaxy of Seyfert II. It has an active core and houses a massive black hole. She is the object of intense star formation in her spiral arms. NGC 1068 is around 50 million years of light from Earth. NGC 1055, upper left, is a spiral galaxy seen by the slice. The field of this mosaic is about the size of the full moon. On bottom right, NGC 1068 (M77) at about 50 million light years away in the southern constellation of Cetus. It is a Seyfert 2 active galaxy with an active galactic nucleus and contains a massive black hole. On the top left, the edge - on NGC 1055 spiral galaxy. The mosaicked field is about the size of the full Moon

Spiral galaxies NGC 1055 and NGC 1068 in the Whale - NGC 1055 and NGC 1068 spiral galaxies in Cetus - M77 (NGC 1068), bottom right: this active galaxy is a typical example of a galaxy of Seyfert II. It has an active core and houses a massive black hole. She is the object of intense star formation in her spiral arms. NGC 1068 is around 50 million years of light from Earth. NGC 1055, upper left, is a spiral galaxy seen by the slice. The field of this mosaic is about the size of the full moon. On bottom right, NGC 1068 (M77) at about 50 million light years away in the southern constellation of Cetus. It is a Seyfert 2 active galaxy with an active galactic nucleus and contains a massive black hole. On the top left, the edge - on NGC 1055 spiral galaxy. The mosaicked field is about the size of the full Moon

R. Gendler

PIX4609610

London, England: c. 1920 An astronomical model for higher education in the New County Hall in Westminster showing the motions of the earth, moon and sun.

London, England: c. 1920 An astronomical model for higher education in the New County Hall in Westminster showing the motions of the earth, moon and sun.

UIG5452888

Reverse side of an astrolabe, with two plates, c.1555 (brass)

Reverse side of an astrolabe, with two plates, c.1555 (brass)

MMM5470394

Detail of an astrolabe: the two plates (battery side), c.1555 (brass)

Detail of an astrolabe: the two plates (battery side), c.1555 (brass)

MMM5470403

The New Horizons probe near 2014 MU69 - Artist view

The New Horizons probe near 2014 MU69 - Artist view

Miller, Ron (b.1947)

PIX7223388

Constellation Lizard - Constellation of Lacerta - Lacerta (the Lizard) was a constellation invented by the Polish astronomer Johannes Hevelius in 1687. It lies boxed in on all sides by the much more interesting groupings of Cygnus, Cephus, Pegasus and Andromeda. Lacerta had no bright stars or significant deep sky objects apart from 14th magnitude star - like object BL Lac, a prototype of an unusal kind of active galaxy whose nucleus varies in brightness by a few magnitudes over several days

Constellation Lizard - Constellation of Lacerta - Lacerta (the Lizard) was a constellation invented by the Polish astronomer Johannes Hevelius in 1687. It lies boxed in on all sides by the much more interesting groupings of Cygnus, Cephus, Pegasus and Andromeda. Lacerta had no bright stars or significant deep sky objects apart from 14th magnitude star - like object BL Lac, a prototype of an unusal kind of active galaxy whose nucleus varies in brightness by a few magnitudes over several days

PIX4591879

Remnants of the supernova Cassiopee A en X by Chandra - Object Description: Cas A is the remnant of a star that exploded about 300 years ago. The X - ray image shows an expanding shell of hot gas produced by the explosion. This gaseous shell is about 10 light years in diameter, and has a temperature of about 50 million degrees. Scale: Image is 6 arcmin on a side. Cassiopeia A: The 320 year old remnant of a massive star that exploded. Located in the constellation Cassiopeia, it is 10 light years across and 10,000 light years from Earth

Remnants of the supernova Cassiopee A en X by Chandra - Object Description: Cas A is the remnant of a star that exploded about 300 years ago. The X - ray image shows an expanding shell of hot gas produced by the explosion. This gaseous shell is about 10 light years in diameter, and has a temperature of about 50 million degrees. Scale: Image is 6 arcmin on a side. Cassiopeia A: The 320 year old remnant of a massive star that exploded. Located in the constellation Cassiopeia, it is 10 light years across and 10,000 light years from Earth

PIX4582917

Open Cluster of Pleiades - The Pleiades star cluster - The Pleiades cluster is a cluster of about 500 young stars nees 150 million years ago. Visible in the constellation Taurus, this cluster is 440 years from the Earth. Object number 45 in Messier's catalog is the Pleiades, also know as the Seven Sisters for the seven stars that can be easily seen with excellent eyesight.The Pleiades is a relatively nearby open cluster, which according to new data from the Hipparcos satellite is located at a distance of 370 light years. The cluster is surrounded by blue nebulosity illuminated by the light reflected from the nearby stars. Astro - Physic's 130EDT F/8 Triplet Refractor working at f/6 two 20 minute exposures

Open Cluster of Pleiades - The Pleiades star cluster - The Pleiades cluster is a cluster of about 500 young stars nees 150 million years ago. Visible in the constellation Taurus, this cluster is 440 years from the Earth. Object number 45 in Messier's catalog is the Pleiades, also know as the Seven Sisters for the seven stars that can be easily seen with excellent eyesight.The Pleiades is a relatively nearby open cluster, which according to new data from the Hipparcos satellite is located at a distance of 370 light years. The cluster is surrounded by blue nebulosity illuminated by the light reflected from the nearby stars. Astro - Physic's 130EDT F/8 Triplet Refractor working at f/6 two 20 minute exposures

Jerry Lodriguss

PIX4568688

Spiral galaxy M31 in Andromede compared to the Moon - The Andromeda galaxy and Moon - This image shows how the galaxy of Andromede is very extended in the sky; visible as a small blurred spot with the naked eye, its surface being shiny, it is difficult to imagine its size. By overlaying a more familiar object like the Moon and bringing it back to the same scale as the field of the M31 photo, the galaxy appears in its true dimensions. The Andromede galaxy is located about 2 million light years away from Earth. Two satellite galaxies accompany it: M32 (NGC 221) at the top center, and M110 (NGC 205) at the bottom. Like the lactee path, the Andromede galaxy belongs to the local group, making up about thirty galaxies. Composite image to show how large is the Andromeda galaxy in our sky

Spiral galaxy M31 in Andromede compared to the Moon - The Andromeda galaxy and Moon - This image shows how the galaxy of Andromede is very extended in the sky; visible as a small blurred spot with the naked eye, its surface being shiny, it is difficult to imagine its size. By overlaying a more familiar object like the Moon and bringing it back to the same scale as the field of the M31 photo, the galaxy appears in its true dimensions. The Andromede galaxy is located about 2 million light years away from Earth. Two satellite galaxies accompany it: M32 (NGC 221) at the top center, and M110 (NGC 205) at the bottom. Like the lactee path, the Andromede galaxy belongs to the local group, making up about thirty galaxies. Composite image to show how large is the Andromeda galaxy in our sky

PIX4608836

Butterfield dial for latitude 35 degrees, built around a magnetic compass, 17th century (silver, gilded copper and glass)

Butterfield dial for latitude 35 degrees, built around a magnetic compass, 17th century (silver, gilded copper and glass)

MMM5469074

Sundial with universal equinoxial ring for latitude 0-90 degrees, with engraved indications, c.1635 (brass)

Sundial with universal equinoxial ring for latitude 0-90 degrees, with engraved indications, c.1635 (brass)

MMM5470435

Charon surface - Artist view

Charon surface - Artist view

Miller, Ron (b.1947)

PIX7223426

Cometary blood cell CG4 in the stern - CG4, a cometary blood cell in Puppis - Cometary blood cells are small clouds of isolated gases. The latter, called CG4, is located about 1300 light years ago in the constellation of Pupus. Its head is 1.5 years light and its tail extends for 8 years. This cloud is a star-forming region. A spiral galaxy seen by the slice (ESO 257 - 19) is visible at the top left. It is located 100 million years later. The odd looking “” creature”” to the right of center in the above photo is a gas cloud known as a cometary globule.This globule, however, has ruptured. Cometary globules are typically characterized by dusty heads and elongated tails. These features cause cometary globules to have visual similarities to comets, but in reality they are very much different. Cometary globules are frequently the birthplaces of stars, and many show very young stars in their heads. The reason for the rupture in the head of this object is not completely known. The galaxy to t

Cometary blood cell CG4 in the stern - CG4, a cometary blood cell in Puppis - Cometary blood cells are small clouds of isolated gases. The latter, called CG4, is located about 1300 light years ago in the constellation of Pupus. Its head is 1.5 years light and its tail extends for 8 years. This cloud is a star-forming region. A spiral galaxy seen by the slice (ESO 257 - 19) is visible at the top left. It is located 100 million years later. The odd looking “” creature”” to the right of center in the above photo is a gas cloud known as a cometary globule.This globule, however, has ruptured. Cometary globules are typically characterized by dusty heads and elongated tails. These features cause cometary globules to have visual similarities to comets, but in reality they are very much different. Cometary globules are frequently the birthplaces of stars, and many show very young stars in their heads. The reason for the rupture in the head of this object is not completely known. The galaxy to t

PIX4621547

Exoplanete in formation - LKCA 15 b - Exoplanet forming - LKCA 15 b: Artist's view showing the exoplanet LKCA 15 b, an exoplanet in formation by accretion. LKCA 15 b or Lick-Calcium 15b is a candidate protoplanetary object in orbit around LKCA 15, a star in the Taurus-Auriga Star Forming Region. It was discovered by direct imaging techniques using the Keck II telescope in 2011. A 2015 study of observations from the Magellan Telescopes and the Large Binocular Telescope argued that the planet is forming though accretion. It is the first observed exoplanet seen in the process of active accretion.

Exoplanete in formation - LKCA 15 b - Exoplanet forming - LKCA 15 b: Artist's view showing the exoplanet LKCA 15 b, an exoplanet in formation by accretion. LKCA 15 b or Lick-Calcium 15b is a candidate protoplanetary object in orbit around LKCA 15, a star in the Taurus-Auriga Star Forming Region. It was discovered by direct imaging techniques using the Keck II telescope in 2011. A 2015 study of observations from the Magellan Telescopes and the Large Binocular Telescope argued that the planet is forming though accretion. It is the first observed exoplanet seen in the process of active accretion.

Miller, Ron (b.1947)

PIX4608448

Nebula NGC 3372 in the Carene - The Carina nebula, NGC 3372 - The Carene nebula is located about 7000 years from the Earth. It is home to many hot stars, including the star Eta Carinae in the centre of the nebula. Image obtained by Siding Spring's 3.9m telescope. The brightest part of the Milky Way, as seen by the unaided eye, lies in the southern constellation Carina. Here there are an unusually large number of young, hot stars. Their radiation is rich in energetic ultraviolet light. Many of these stars were born within the spectacular Carinae nebula, seen here. The nebula is a cloud of glowing gas composed mostly of hydrogen. It excited by ultrviolet light from the embedded stars. This dostictive emission radiation is responsible for the red colour. About a quarter of the nebula is made of helium gas, the second most abundant element in the universe after hydrogen, and all the other chemical elements account for only a few percent of the total mass. The brightest star in the nebula i

Nebula NGC 3372 in the Carene - The Carina nebula, NGC 3372 - The Carene nebula is located about 7000 years from the Earth. It is home to many hot stars, including the star Eta Carinae in the centre of the nebula. Image obtained by Siding Spring's 3.9m telescope. The brightest part of the Milky Way, as seen by the unaided eye, lies in the southern constellation Carina. Here there are an unusually large number of young, hot stars. Their radiation is rich in energetic ultraviolet light. Many of these stars were born within the spectacular Carinae nebula, seen here. The nebula is a cloud of glowing gas composed mostly of hydrogen. It excited by ultrviolet light from the embedded stars. This dostictive emission radiation is responsible for the red colour. About a quarter of the nebula is made of helium gas, the second most abundant element in the universe after hydrogen, and all the other chemical elements account for only a few percent of the total mass. The brightest star in the nebula i

PIX4618887

Active galaxy NGC 1068 in the Whale - Active galaxy M77 (NGC 1068) in Cetus - This active galaxy is the typical example of a galaxy of Seyfert II. M77 (NGC 1068) has an active core and houses a massive black hole. She is the object of intense star formation in her spiral arms. NGC 1068 is around 50 million years of light from Earth. Image obtained with a telescope 61 cm in diameter. Located about 60 million light years from Earth, towards the direction of the constellation named Cetus, is an enormous galaxy, much larger than our own, that is surrounded by a even larger cloud of obscuring dust. M77 (NGC 1068) has a powerful jet pouring copious amounts of material into inter - galactic space at enormous speed. This galaxy is a seyfert II type with an active nucleus. It is now believed that the source of this conmotion is a super - massive black hole, ten million times more massive than our Sun, in the process of absorbing material that has ventured too close. Image taken with a 24 - inch

Active galaxy NGC 1068 in the Whale - Active galaxy M77 (NGC 1068) in Cetus - This active galaxy is the typical example of a galaxy of Seyfert II. M77 (NGC 1068) has an active core and houses a massive black hole. She is the object of intense star formation in her spiral arms. NGC 1068 is around 50 million years of light from Earth. Image obtained with a telescope 61 cm in diameter. Located about 60 million light years from Earth, towards the direction of the constellation named Cetus, is an enormous galaxy, much larger than our own, that is surrounded by a even larger cloud of obscuring dust. M77 (NGC 1068) has a powerful jet pouring copious amounts of material into inter - galactic space at enormous speed. This galaxy is a seyfert II type with an active nucleus. It is now believed that the source of this conmotion is a super - massive black hole, ten million times more massive than our Sun, in the process of absorbing material that has ventured too close. Image taken with a 24 - inch

Adam Block

PIX4609602

Asteroide Ceres seen by the space telescope Hubble - Asteroid Ceres - Photos obtained in visible and ultraviolet of the asteroid Ceres from December 2003 to January 2004. Since August 2006, Ceres is considered a dwarf planet. Hubble Space Telescope color image of Ceres, the largest object in the asteroid belt. The observations were made in visible and ultraviolet light between December 2003 and January 2004

Asteroide Ceres seen by the space telescope Hubble - Asteroid Ceres - Photos obtained in visible and ultraviolet of the asteroid Ceres from December 2003 to January 2004. Since August 2006, Ceres is considered a dwarf planet. Hubble Space Telescope color image of Ceres, the largest object in the asteroid belt. The observations were made in visible and ultraviolet light between December 2003 and January 2004

PIX4583523

Tarantula Nebula (NGC 2070) in the river bream - The Tarantula Nebula, around the 30 Dor cluster - The Tarantula Nebula (or 30 Bream) is the largest star-forming region of the Great Magellan Cloud. It is located 170,000 light years ago in the constellation Dorado (southern hemisphere). At the center of this nebula, the open cluster of R136 stars, clusters of hot and massive stars. Image obtained with Siding Spring's 3.9m telescope. This object is the only extra - galactic nebula which can be seen with the unaided eye. It is a faint patch of light at the eastern end of the Large Magellanic Cloud, 170,000 light years distant. A small telescope reveals narrow spindly tendrils of glowing gas which have been likened to the legs of a spider. The 'body' of the spider is the bright nebula seen at the centre of the photograph, while at its core is an extremely dense clump of very hot stars, until recently thought to a single, unusually massive star known as 30 Doradus. The very hot stars of 30

Tarantula Nebula (NGC 2070) in the river bream - The Tarantula Nebula, around the 30 Dor cluster - The Tarantula Nebula (or 30 Bream) is the largest star-forming region of the Great Magellan Cloud. It is located 170,000 light years ago in the constellation Dorado (southern hemisphere). At the center of this nebula, the open cluster of R136 stars, clusters of hot and massive stars. Image obtained with Siding Spring's 3.9m telescope. This object is the only extra - galactic nebula which can be seen with the unaided eye. It is a faint patch of light at the eastern end of the Large Magellanic Cloud, 170,000 light years distant. A small telescope reveals narrow spindly tendrils of glowing gas which have been likened to the legs of a spider. The 'body' of the spider is the bright nebula seen at the centre of the photograph, while at its core is an extremely dense clump of very hot stars, until recently thought to a single, unusually massive star known as 30 Doradus. The very hot stars of 30

PIX4618255

Constellations of Andromede and Cassiopee - Andromeda and Cassiopeia constellations - Field around the constellations of Andromede and Cassiopee. From ancient times the constellation of Andromeda has represented a woman and in Greek mythology Andromeda was the daughter of Cepheus and Cassiopeia, king and boastful queen of the Phoenician kingdom of Ethiopia. As punishment for her mother's arrogance she was chained to a rock as a sacrifece to Cetus, then rescued by Perseus whom she subsequently married. The modern constellation is the 19th largest in the sky and covers about 720 square degrees but is not very obvious. The three brightest stars of Andromeda form a broad arc south of the distinctive 'W' of Cassiopeia, and under a dark sky the elongated shape of M32 is just visible to the unaided eye. This is by far the best - known object in the field. Best seen in the early evening in Novembe

Constellations of Andromede and Cassiopee - Andromeda and Cassiopeia constellations - Field around the constellations of Andromede and Cassiopee. From ancient times the constellation of Andromeda has represented a woman and in Greek mythology Andromeda was the daughter of Cepheus and Cassiopeia, king and boastful queen of the Phoenician kingdom of Ethiopia. As punishment for her mother's arrogance she was chained to a rock as a sacrifece to Cetus, then rescued by Perseus whom she subsequently married. The modern constellation is the 19th largest in the sky and covers about 720 square degrees but is not very obvious. The three brightest stars of Andromeda form a broad arc south of the distinctive 'W' of Cassiopeia, and under a dark sky the elongated shape of M32 is just visible to the unaided eye. This is by far the best - known object in the field. Best seen in the early evening in Novembe

PIX4588956

Tarantula (NGC 2070) in the LMC - The nebula around 30 Doradus (NGC 2070) in the LMC - The Tarantula Nebula (or 30 Bream) is the largest star-forming region of the Great Magellan Cloud. It is located 170,000 light years ago in the constellation Dorado (southern hemisphere). At the center of this nebula, the open cluster of R136 stars, clusters of hot and massive stars. Image obtained with Siding Spring's 3.9m telescope. The brightest cluster of stars in this picture was believed until recently to contain a single, uniquely massive object with the mass equivalent to 1000 suns, and was named as a star, 30 Doradus. Sophisticated image analysis techniques have been used to show that 30 Doradus is a very compact group of stars, many of which are massive, but not unimaginably so. The radiation from this star cluster is sufficient to excite a huge cloud of hydrogen gas in its vicinity so that it glows with its distinctive red colour. This picture is essentially a one minute exposure. A longer

Tarantula (NGC 2070) in the LMC - The nebula around 30 Doradus (NGC 2070) in the LMC - The Tarantula Nebula (or 30 Bream) is the largest star-forming region of the Great Magellan Cloud. It is located 170,000 light years ago in the constellation Dorado (southern hemisphere). At the center of this nebula, the open cluster of R136 stars, clusters of hot and massive stars. Image obtained with Siding Spring's 3.9m telescope. The brightest cluster of stars in this picture was believed until recently to contain a single, uniquely massive object with the mass equivalent to 1000 suns, and was named as a star, 30 Doradus. Sophisticated image analysis techniques have been used to show that 30 Doradus is a very compact group of stars, many of which are massive, but not unimaginably so. The radiation from this star cluster is sufficient to excite a huge cloud of hydrogen gas in its vicinity so that it glows with its distinctive red colour. This picture is essentially a one minute exposure. A longer

PIX4618266

Omega nebula (M17) in Sagittarius - The Omega nebula (M17) in Sagittarius - View of the Omega nebula (M17/NGC 6618) located in the constellation Sagittarius at a distance of 5700 light years. This object derives its name from its looped shape reminiscent of the Greek letter when the nebula is seen in a telescope. The gas cloud is unusual in that it does not appear to be illuminated by the bright stars that commonly found in emission nebulae such as this. However, the nebulosity is very bright, so the exciting stars must be hidden within the cloud, an idea confirmed by the infrared brightness of the nebula. As well as exciting the nebula we can see, the embedded stars heat the dust that surrounds them, so M17 is one of the brightest objects in the infrared sky. It is about 6000 light years distant

Omega nebula (M17) in Sagittarius - The Omega nebula (M17) in Sagittarius - View of the Omega nebula (M17/NGC 6618) located in the constellation Sagittarius at a distance of 5700 light years. This object derives its name from its looped shape reminiscent of the Greek letter when the nebula is seen in a telescope. The gas cloud is unusual in that it does not appear to be illuminated by the bright stars that commonly found in emission nebulae such as this. However, the nebulosity is very bright, so the exciting stars must be hidden within the cloud, an idea confirmed by the infrared brightness of the nebula. As well as exciting the nebula we can see, the embedded stars heat the dust that surrounds them, so M17 is one of the brightest objects in the infrared sky. It is about 6000 light years distant

PIX4620118

Omega nebula (M17) in Sagittarius - The Omega nebula (M17) in Sagittarius - View of the Omega nebula (M17/NGC 6618) located in the constellation Sagittarius at a distance of 5700 light years. This object derives its name from its looped shape reminiscent of the Greek letter when the nebula is seen in a telescope. The gas cloud is unusual in that it does not appear to be illuminated by the bright stars that commonly found in emission nebulae such as this. However, the nebulosity is very bright, so the exciting stars must be hidden within the cloud, an idea confirmed by the infrared brightness of the nebula. As well as exciting the nebula we can see, the embedded stars heat the dust that surrounds them, so M17 is one of the brightest objects in the infrared sky. It is about 6000 light years distant

Omega nebula (M17) in Sagittarius - The Omega nebula (M17) in Sagittarius - View of the Omega nebula (M17/NGC 6618) located in the constellation Sagittarius at a distance of 5700 light years. This object derives its name from its looped shape reminiscent of the Greek letter when the nebula is seen in a telescope. The gas cloud is unusual in that it does not appear to be illuminated by the bright stars that commonly found in emission nebulae such as this. However, the nebulosity is very bright, so the exciting stars must be hidden within the cloud, an idea confirmed by the infrared brightness of the nebula. As well as exciting the nebula we can see, the embedded stars heat the dust that surrounds them, so M17 is one of the brightest objects in the infrared sky. It is about 6000 light years distant

PIX4620153

Omega nebula (M17) in Sagittarius - The Omega nebula (M17) in Sagittarius - View of the Omega nebula (M17/NGC 6618) located in the constellation Sagittarius at a distance of 5700 light years. This object derives its name from its looped shape reminiscent of the Greek letter when the nebula is seen in a telescope. The gas cloud is unusual in that it does not appear to be illuminated by the bright stars that commonly found in emission nebulae such as this. However, the nebulosity is very bright, so the exciting stars must be hidden within the cloud, an idea confirmed by the infrared brightness of the nebula. As well as exciting the nebula we can see, the embedded stars heat the dust that surrounds them, so M17 is one of the brightest objects in the infrared sky. It is about 6000 light years distant

Omega nebula (M17) in Sagittarius - The Omega nebula (M17) in Sagittarius - View of the Omega nebula (M17/NGC 6618) located in the constellation Sagittarius at a distance of 5700 light years. This object derives its name from its looped shape reminiscent of the Greek letter when the nebula is seen in a telescope. The gas cloud is unusual in that it does not appear to be illuminated by the bright stars that commonly found in emission nebulae such as this. However, the nebulosity is very bright, so the exciting stars must be hidden within the cloud, an idea confirmed by the infrared brightness of the nebula. As well as exciting the nebula we can see, the embedded stars heat the dust that surrounds them, so M17 is one of the brightest objects in the infrared sky. It is about 6000 light years distant

Adam Block

PIX4620160

Cosmographic plate with the map of the universe and of the two most known planetary systems, engraving by G. Zuliani taken from Tome I of the "Newest Atlas" published in Venice in 1777 by Antonio Zatta

Cosmographic plate with the map of the universe and of the two most known planetary systems, engraving by G. Zuliani taken from Tome I of the "Newest Atlas" published in Venice in 1777 by Antonio Zatta

Zuliani, G. (18th century)

FAF3572497

Nebula of the cone NGC 2264 in the Unicorn - The Cone Nebula in Monoceros - Region H II located about 2600 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope. The Cone nebula is part of an enormous cloud of hydrogen and tiny solid particles associated with the loose open cluster, NGC 2226 in the equatorial constellation of Monoceros. Within and around this cloud are many recently formed stars, some completely hidden within the dense interstellar matter. They can be detected by special infra - red techniques which are able to penetrate the obscuration. The largest of the dust clouds is the curious straight - sided feature which gives this object its name

Nebula of the cone NGC 2264 in the Unicorn - The Cone Nebula in Monoceros - Region H II located about 2600 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope. The Cone nebula is part of an enormous cloud of hydrogen and tiny solid particles associated with the loose open cluster, NGC 2226 in the equatorial constellation of Monoceros. Within and around this cloud are many recently formed stars, some completely hidden within the dense interstellar matter. They can be detected by special infra - red techniques which are able to penetrate the obscuration. The largest of the dust clouds is the curious straight - sided feature which gives this object its name

PIX4618601

Active galaxy NGC 1068 in the Whale - Active galaxy M77 (NGC 1068) in Cetus - This active galaxy is the typical example of a galaxy of Seyfert II. M77 (NGC 1068) has an active core and houses a massive black hole. She is the object of intense star formation in her spiral arms. NGC 1068 is about 45 million years ago - light from Earth. Image obtained with the Hubble Space Telescope (HST). The NASA/ESA Hubble Space Telescope has captured this vivid image of spiral galaxy Messier 77 - - a galaxy in the constellation of Cetus, some 45 million light - years away from us. The streaks of red and blue in the image highlight pockets of star formation along the pinwheeling arms, with dark dust lanes stretching across the galaxy's starry centre. The galaxy belongs to a class of galaxies known as Seyfert galaxies, which have highly ionised gas surrounding an intensely active centre

Active galaxy NGC 1068 in the Whale - Active galaxy M77 (NGC 1068) in Cetus - This active galaxy is the typical example of a galaxy of Seyfert II. M77 (NGC 1068) has an active core and houses a massive black hole. She is the object of intense star formation in her spiral arms. NGC 1068 is about 45 million years ago - light from Earth. Image obtained with the Hubble Space Telescope (HST). The NASA/ESA Hubble Space Telescope has captured this vivid image of spiral galaxy Messier 77 - - a galaxy in the constellation of Cetus, some 45 million light - years away from us. The streaks of red and blue in the image highlight pockets of star formation along the pinwheeling arms, with dark dust lanes stretching across the galaxy's starry centre. The galaxy belongs to a class of galaxies known as Seyfert galaxies, which have highly ionised gas surrounding an intensely active centre

PIX4609613

Nebula NGC 3603 in Carene - Star formation region NGC 3603 in Carina - NGC 3603 is located about 7000 years - light from Earth in the constellation Carene. Within this nebula, a cluster of massive stars, Wolf - Rayet stars. Image obtained by Siding Spring's 3.9m telescope. Although stars are well known to form in clusters, most of the stars in the young groups we know of in our own galaxy are well separated in space. In NGC 3603 the stars are remarkably close together. Moreover, many of the stars in this compact constellation are Wolf - Rayet stars, extremely hot, massive objects, rarely found in such profusion in clusters. Exactly why some clusters form massive stars and others do not is a hot topic in astronomy, so this cluster and its environment has been extensively studied. This curious collection of young objects is, as far as we know, unique in our galaxy, though the enigmatic object at the centre of the Tarantula Nebula in the Large Magellanic Cloud is now known to be a similar

Nebula NGC 3603 in Carene - Star formation region NGC 3603 in Carina - NGC 3603 is located about 7000 years - light from Earth in the constellation Carene. Within this nebula, a cluster of massive stars, Wolf - Rayet stars. Image obtained by Siding Spring's 3.9m telescope. Although stars are well known to form in clusters, most of the stars in the young groups we know of in our own galaxy are well separated in space. In NGC 3603 the stars are remarkably close together. Moreover, many of the stars in this compact constellation are Wolf - Rayet stars, extremely hot, massive objects, rarely found in such profusion in clusters. Exactly why some clusters form massive stars and others do not is a hot topic in astronomy, so this cluster and its environment has been extensively studied. This curious collection of young objects is, as far as we know, unique in our galaxy, though the enigmatic object at the centre of the Tarantula Nebula in the Large Magellanic Cloud is now known to be a similar

PIX4619216

Abell 2218 galaxy cluster in the Dragon - Gravitational lenses in the galaxy cluster Abell 2218 - The Abell 2218 galaxy cluster is located about 2 billion years ago - light from Earth in the constellation of the Dragon. It is so massive that its gravity curved and amplifies the light from other galaxies located behind it. Thus, these galaxies appear on this cliche obtained by the Hubble space telescope in the form of arcs. Abell 2218 resides in the constellation Draco, some 2 billion light - years from Earth. The cluster is so massive that its enormous gravitational field deflects light rays passing through it, much as an optical lens bends light to form an image. This phenomenon, called gravitational lensing, magnifies, brightens, and distorts images from faraway objects. The cluster's magnifying powers provides a powerful “” zoom lens”” for viewing distant galaxies that could not normally be observed with the largest telescopes. This useful phenomenon has produced the arc - shaped pa

Abell 2218 galaxy cluster in the Dragon - Gravitational lenses in the galaxy cluster Abell 2218 - The Abell 2218 galaxy cluster is located about 2 billion years ago - light from Earth in the constellation of the Dragon. It is so massive that its gravity curved and amplifies the light from other galaxies located behind it. Thus, these galaxies appear on this cliche obtained by the Hubble space telescope in the form of arcs. Abell 2218 resides in the constellation Draco, some 2 billion light - years from Earth. The cluster is so massive that its enormous gravitational field deflects light rays passing through it, much as an optical lens bends light to form an image. This phenomenon, called gravitational lensing, magnifies, brightens, and distorts images from faraway objects. The cluster's magnifying powers provides a powerful “” zoom lens”” for viewing distant galaxies that could not normally be observed with the largest telescopes. This useful phenomenon has produced the arc - shaped pa

PIX4565631

Interacting galaxies UGC 8058 - Interacting galaxies UGC 8058 - The galaxy UGC 8058 (Markarian 231) is located about 600 million light years away from Earth in the constellation Big Bear. This interacting galaxy houses a quasar in its center. It is one of the brightest ultra-bright infrared galaxy known to date. It has a central black hole and intense star formations are observed. Image obtained by the Hubble Space Telescope on May 10, 2002. The extraordinary galaxy UGC 8058, also known as Markarian 231, was discovered in 1969 as part of a survey searching for galaxies with strong ultraviolet radiation. It has long tidal tails and a disturbed shape. Results from the first spectrum showed clear signs of the presence of a powerful quasar in the center that made Markarian 231 unique in the Markarian sample. Markarian 231 has maintained its reputation as an exceptional object since those early observations and continues to be a favorite target in all wavelength regimes. Its infrared lumino

Interacting galaxies UGC 8058 - Interacting galaxies UGC 8058 - The galaxy UGC 8058 (Markarian 231) is located about 600 million light years away from Earth in the constellation Big Bear. This interacting galaxy houses a quasar in its center. It is one of the brightest ultra-bright infrared galaxy known to date. It has a central black hole and intense star formations are observed. Image obtained by the Hubble Space Telescope on May 10, 2002. The extraordinary galaxy UGC 8058, also known as Markarian 231, was discovered in 1969 as part of a survey searching for galaxies with strong ultraviolet radiation. It has long tidal tails and a disturbed shape. Results from the first spectrum showed clear signs of the presence of a powerful quasar in the center that made Markarian 231 unique in the Markarian sample. Markarian 231 has maintained its reputation as an exceptional object since those early observations and continues to be a favorite target in all wavelength regimes. Its infrared lumino

PIX4613687

Barree spiral galaxy NGC 1097 in the Furnace - Barred spiral galaxy NGC 1097 in Fornax - Located at a distance of about 45 million years - light, NGC 1097 is the object of intense star formation and is an active core galaxy with a supermassive black hole in its heart. Image obtained by the Hubble Space Telescope (HST). The NASA/ESA Hubble Space Telescope provides us with a spectacular image of the bright star - forming ring that surrounds the heart of the barred spiral galaxy NGC 1097. In this image, the larger - scale structure of the galaxy is barely visible: its comparatively dim spiral arms, which surround its heart in a loose embrace, reach out beyond the edges of this frame. This face - on galaxy, lying 45 million light - years away from Earth in the southern constellation of Fornax (The Furnace), is particularly attractive for astronomers. NGC 1097 is a Seyfert galaxy. Lurking at the very centre of the galaxy, a supermassive black hole 100 million times the mass of our Sun is gr

Barree spiral galaxy NGC 1097 in the Furnace - Barred spiral galaxy NGC 1097 in Fornax - Located at a distance of about 45 million years - light, NGC 1097 is the object of intense star formation and is an active core galaxy with a supermassive black hole in its heart. Image obtained by the Hubble Space Telescope (HST). The NASA/ESA Hubble Space Telescope provides us with a spectacular image of the bright star - forming ring that surrounds the heart of the barred spiral galaxy NGC 1097. In this image, the larger - scale structure of the galaxy is barely visible: its comparatively dim spiral arms, which surround its heart in a loose embrace, reach out beyond the edges of this frame. This face - on galaxy, lying 45 million light - years away from Earth in the southern constellation of Fornax (The Furnace), is particularly attractive for astronomers. NGC 1097 is a Seyfert galaxy. Lurking at the very centre of the galaxy, a supermassive black hole 100 million times the mass of our Sun is gr

PIX4609655

Comete 17P/Holmes - Comet 17P/Holmes - View of comete 17P/Holmes beginning November 2007 from the Paranal Observatory in Chile. In the foreground, one of the 1.8m diameter auxilliary telescopes. On October 24, 2007, Comete 17P/Holmes suddenly increased luminosite and became visible to the naked eye. Comet 17P/Holmes is seen here from Paranal observatory in Chile. Foreground is one of the 1,8m auxilliary telescope. Comet 17P/Holmes began a spectacular outburst in brightness on October 24th, brightening from 17th magnitude to 2.5th magnitude, an increase of more than 1 million times brighter to become a unaided - eye object in the constellation of Perseus

Comete 17P/Holmes - Comet 17P/Holmes - View of comete 17P/Holmes beginning November 2007 from the Paranal Observatory in Chile. In the foreground, one of the 1.8m diameter auxilliary telescopes. On October 24, 2007, Comete 17P/Holmes suddenly increased luminosite and became visible to the naked eye. Comet 17P/Holmes is seen here from Paranal observatory in Chile. Foreground is one of the 1,8m auxilliary telescope. Comet 17P/Holmes began a spectacular outburst in brightness on October 24th, brightening from 17th magnitude to 2.5th magnitude, an increase of more than 1 million times brighter to become a unaided - eye object in the constellation of Perseus

Stephane Guisard

PIX4570953

Diptych sundial (open), with magnetic compass. Ivory instrument around 1640, by Jacob Karner (?), c.1640 (ivory)

Diptych sundial (open), with magnetic compass. Ivory instrument around 1640, by Jacob Karner (?), c.1640 (ivory)

MMM5473360

Geyser on Pluto - Artist view

Geyser on Pluto - Artist view

Miller, Ron (b.1947)

PIX7223419

500 lire silver coin commemorating Galileo Galilei (1564-1642), 1983, obverse depicting Galileo Galilei (1564-1642), Italy, 20th century

500 lire silver coin commemorating Galileo Galilei (1564-1642), 1983, obverse depicting Galileo Galilei (1564-1642), Italy, 20th century

DGA2588592

Galaxy clusters Abell 370 - Abell 370 cluster of galaxies with gravitational arcs - This cluster contains a large number of galaxies, most of which are elliptical. A gravitational arc is visible at the bottom of the image. This is the deformed image of a galaxy farther away behind the cluster. This cluster hosts one of the most prominent gravitational arcs known to date. The light of a very remote object is deformed by the foreground cluster. Abell 370, at the center of the photo, contains a large number of galaxies - most of them are ellipticals. The two brightest red galaxies slightly above the gravitational arc are the most massive in the cluster and give an important contribution to the lensing event. This gravitational arc - in combination with the cluster of galaxies - provides a natural laboratory to study the physics of gravity. The exact shape of the arc allows to estimate the mass of the cluster through the equations of general relativity

Galaxy clusters Abell 370 - Abell 370 cluster of galaxies with gravitational arcs - This cluster contains a large number of galaxies, most of which are elliptical. A gravitational arc is visible at the bottom of the image. This is the deformed image of a galaxy farther away behind the cluster. This cluster hosts one of the most prominent gravitational arcs known to date. The light of a very remote object is deformed by the foreground cluster. Abell 370, at the center of the photo, contains a large number of galaxies - most of them are ellipticals. The two brightest red galaxies slightly above the gravitational arc are the most massive in the cluster and give an important contribution to the lensing event. This gravitational arc - in combination with the cluster of galaxies - provides a natural laboratory to study the physics of gravity. The exact shape of the arc allows to estimate the mass of the cluster through the equations of general relativity

PIX4565645

The dwarf planet Makemake - Illustration - Dwarf planet Makemake - Artwork: The solar system seen from the dwarf planet Makemake. Makemake (136472 Makemake) is the third largest known dwarf planet. It belongs to the Kuiper belt and was discovered in 2005. Its diameter is about two thirds that of Pluto, or 1,430 km - Solar system seen from Makemake - Makemake (minor-planet designation 136472 Makemake) is a dwarf planet and perhaps the largest Kuiper belt object with a diameter approximately two thirds that of Pluto. Makemake has one known satellite, S/2015 (136472). Makemake was discovered on March 31, 2005

The dwarf planet Makemake - Illustration - Dwarf planet Makemake - Artwork: The solar system seen from the dwarf planet Makemake. Makemake (136472 Makemake) is the third largest known dwarf planet. It belongs to the Kuiper belt and was discovered in 2005. Its diameter is about two thirds that of Pluto, or 1,430 km - Solar system seen from Makemake - Makemake (minor-planet designation 136472 Makemake) is a dwarf planet and perhaps the largest Kuiper belt object with a diameter approximately two thirds that of Pluto. Makemake has one known satellite, S/2015 (136472). Makemake was discovered on March 31, 2005

Miller, Ron (b.1947)

PIX4629590

Supernova Sn 2004dj in the galaxy NGC 2403 - The explosion of a massive star blazes with the light of 200 million Suns in this NASA Hubble Space Telescope image. The supernova is so bright in this image that it easily could be mistaken for a foreground star in our Milky Way Galaxy. And yet, this supernova, called SN 2004dj, resides far beyond our galaxy. Its home is in the outskirts of NGC 2403, a galaxy located 11 million light - years from Earth. Although the supernova is far from Earth, it is the closest stellar explosion discovered in more than a decade. The star that became SN 2004dj may have been about 15 times as massive as the Sun, and only about 14 million years old. (Massive stars live much shorter lives than the Sun; they have more fuel to “” burn”” through nuclear fusion, but they use it up at a disproportionately faster rate.) The large number of massive stars in NGC 2403 leads to a high supernova rate. Two other supernovae have been seen in this galaxy during the past hal

Supernova Sn 2004dj in the galaxy NGC 2403 - The explosion of a massive star blazes with the light of 200 million Suns in this NASA Hubble Space Telescope image. The supernova is so bright in this image that it easily could be mistaken for a foreground star in our Milky Way Galaxy. And yet, this supernova, called SN 2004dj, resides far beyond our galaxy. Its home is in the outskirts of NGC 2403, a galaxy located 11 million light - years from Earth. Although the supernova is far from Earth, it is the closest stellar explosion discovered in more than a decade. The star that became SN 2004dj may have been about 15 times as massive as the Sun, and only about 14 million years old. (Massive stars live much shorter lives than the Sun; they have more fuel to “” burn”” through nuclear fusion, but they use it up at a disproportionately faster rate.) The large number of massive stars in NGC 2403 leads to a high supernova rate. Two other supernovae have been seen in this galaxy during the past hal

PIX4582457

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20/NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Measuring some forty light years across, this nebula contains enough gas to make many thousands of suns. Within it a number of young hot stars have already formed. The hottest cause the gas, mostly hydrogen, to emit its characteristic red light. Around the red emission nebula the gas contains many dust grains which preferentially reflect the blue component of starlight. In some parts of the nebula there are so many dust grains that they hide the glowing gas, producing the three dark lanes which give the object its name. Trifid is located in Sagittarius constellation between 5000 and 10 000 light - years away

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20/NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Measuring some forty light years across, this nebula contains enough gas to make many thousands of suns. Within it a number of young hot stars have already formed. The hottest cause the gas, mostly hydrogen, to emit its characteristic red light. Around the red emission nebula the gas contains many dust grains which preferentially reflect the blue component of starlight. In some parts of the nebula there are so many dust grains that they hide the glowing gas, producing the three dark lanes which give the object its name. Trifid is located in Sagittarius constellation between 5000 and 10 000 light - years away

R. Jay GaBany

PIX4619512

Spiral galaxy NGC 300 in the Sculptor - Galaxy NGC 300 in Sculptor - Located about 7 million years ago - light from Earth, the spiral galaxy NGC 300 belongs to the Sculptor's group. It appears to us as a great object in the sky since its apparent diameter is almost that of the full moon. This photo was obtained by the MPG/ESO telesope of 2.2 - m in La Silla in Chile, total pose of 50 hours. Located some 7 million light - years away, the spiral galaxy NGC 300 is a beautiful representative of its class, a Milky - Way - like member of the prominent Sculptor group of galaxies in the southern constellation of that name. This picture of NGC 300 was taken using the Wide Field Imager (WFI) at Eso's La Silla Observatory in Chile. It was assembled from many individual images through a large set of different filters over many observing nights, spanning several years. The images were mostly taken through filters that transmit red, green or blue light. These were supplemented by images through spec

Spiral galaxy NGC 300 in the Sculptor - Galaxy NGC 300 in Sculptor - Located about 7 million years ago - light from Earth, the spiral galaxy NGC 300 belongs to the Sculptor's group. It appears to us as a great object in the sky since its apparent diameter is almost that of the full moon. This photo was obtained by the MPG/ESO telesope of 2.2 - m in La Silla in Chile, total pose of 50 hours. Located some 7 million light - years away, the spiral galaxy NGC 300 is a beautiful representative of its class, a Milky - Way - like member of the prominent Sculptor group of galaxies in the southern constellation of that name. This picture of NGC 300 was taken using the Wide Field Imager (WFI) at Eso's La Silla Observatory in Chile. It was assembled from many individual images through a large set of different filters over many observing nights, spanning several years. The images were mostly taken through filters that transmit red, green or blue light. These were supplemented by images through spec

PIX4609239

Southern Crown Nebula - The Corona Australis nebula (NGC 6726 - 27 - 29) - R Coronae Australis is a region of star formations visible in the southern hemisphere. It is located about 500 light years away from Earth. Image made with Siding Spring's 3.9m telescope. This spectacular reflection nebula is the result of a few bright stars caught up in a large, dusty cloud. If that is all there was here, this region would be considered to be like the Pleiades, an accidental association of dust and stars. However, there are features here that show the dark cloud to be an active star forming nebula, though most of the action is hidden from view. The peculiar yellowish curved streak near the two bright reflection nebulae surround an intriguing object best seen in infrared light, R CRA, a young star still accreting interstellar material on to its surface. It seems to be the source of two compact but distinctly red patches which are Herbig - Haro objects, often the first visible signs of star forma

Southern Crown Nebula - The Corona Australis nebula (NGC 6726 - 27 - 29) - R Coronae Australis is a region of star formations visible in the southern hemisphere. It is located about 500 light years away from Earth. Image made with Siding Spring's 3.9m telescope. This spectacular reflection nebula is the result of a few bright stars caught up in a large, dusty cloud. If that is all there was here, this region would be considered to be like the Pleiades, an accidental association of dust and stars. However, there are features here that show the dark cloud to be an active star forming nebula, though most of the action is hidden from view. The peculiar yellowish curved streak near the two bright reflection nebulae surround an intriguing object best seen in infrared light, R CRA, a young star still accreting interstellar material on to its surface. It seems to be the source of two compact but distinctly red patches which are Herbig - Haro objects, often the first visible signs of star forma

PIX4620228

Spiral galaxy NGC 300 in the Sculptor - Galaxy NGC 300 in Sculptor - Located about 7 million years ago - light from Earth, the spiral galaxy NGC 300 belongs to the Sculptor's group. It appears to us as a great object in the sky since its apparent diameter is almost that of the full moon. This photo made by the Hubble space telesope in 2002 shows the central part of the galaxy and reveals myriad stars. NGC 300 is a spiral galaxy similar to our own Milky Way galaxy. It is a member of a nearby group of galaxies known as the Sculptor group, named for the southern constellation where the group can be found. The distance to NGC 300 is 6.5 million light - years, making it one of the Milky Way's closer neighbors. At this distance, only the brightest stars can be picked out from ground - based images. With a resolution some 10 times better than ground - based telescopes, Hubble's Advanced Camera for Surveys (ACS) resolves many more stars in this galaxy than can be detected from the ground

Spiral galaxy NGC 300 in the Sculptor - Galaxy NGC 300 in Sculptor - Located about 7 million years ago - light from Earth, the spiral galaxy NGC 300 belongs to the Sculptor's group. It appears to us as a great object in the sky since its apparent diameter is almost that of the full moon. This photo made by the Hubble space telesope in 2002 shows the central part of the galaxy and reveals myriad stars. NGC 300 is a spiral galaxy similar to our own Milky Way galaxy. It is a member of a nearby group of galaxies known as the Sculptor group, named for the southern constellation where the group can be found. The distance to NGC 300 is 6.5 million light - years, making it one of the Milky Way's closer neighbors. At this distance, only the brightest stars can be picked out from ground - based images. With a resolution some 10 times better than ground - based telescopes, Hubble's Advanced Camera for Surveys (ACS) resolves many more stars in this galaxy than can be detected from the ground

PIX4609146

Elliptical galaxy NGC 1275 in Perseus

Elliptical galaxy NGC 1275 in Perseus

PIX5620129

Pegase Constellation - Constellation of Pegasus - Pegasus represents a winged horse of Greek mythology, a figure that appears quite often, most spectacularly as the great winged steed of Bellerophon. The word Pegasus itself is derived from the Greek meaning 'strong'. Pegasus was the son of Neptune and Medusa the Gorgon, and sprang from the blood of his mother when her head had been severed by Perseus. Because Pegasus was considered a mortal, when he died he was placed in the heavens as a constellation by Zeus. Adjoining Pegasus is Equuleus, the foal. The most distinctive part of constellation is the Great Square of Pegasus. Its northernmost star, Sirrah, was incorparated into Andromeda when the constellation boundaries were formalized in the 1930s; it used to be delta (d) Pegasi. Because of its position in the sky, the first two objects in the New General Catalogue (NGC) appear in the Pegasus. NGC 1 and NGC 2 are distant, unremarkable galaxies, indeed this large constellation as a whol

Pegase Constellation - Constellation of Pegasus - Pegasus represents a winged horse of Greek mythology, a figure that appears quite often, most spectacularly as the great winged steed of Bellerophon. The word Pegasus itself is derived from the Greek meaning 'strong'. Pegasus was the son of Neptune and Medusa the Gorgon, and sprang from the blood of his mother when her head had been severed by Perseus. Because Pegasus was considered a mortal, when he died he was placed in the heavens as a constellation by Zeus. Adjoining Pegasus is Equuleus, the foal. The most distinctive part of constellation is the Great Square of Pegasus. Its northernmost star, Sirrah, was incorparated into Andromeda when the constellation boundaries were formalized in the 1930s; it used to be delta (d) Pegasi. Because of its position in the sky, the first two objects in the New General Catalogue (NGC) appear in the Pegasus. NGC 1 and NGC 2 are distant, unremarkable galaxies, indeed this large constellation as a whol

PIX4593125

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20/NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Measuring some forty light years across, this nebula contains enough gas to make many thousands of suns. Within it a number of young hot stars have already formed. The hottest cause the gas, mostly hydrogen, to emit its characteristic red light. Around the red emission nebula the gas contains many dust grains which preferentially reflect the blue component of starlight, and to the north (top) of the nebula can be seen a bright star which illuminates part of the dust to create a region of blue reflection. In some parts of the nebula there are so many dust grains that they hide the glowing gas, producing the three dark lanes which give the object its name. Trifid is located in Sagittarius constellation between 5000 and 10 000 light - years away

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20/NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Measuring some forty light years across, this nebula contains enough gas to make many thousands of suns. Within it a number of young hot stars have already formed. The hottest cause the gas, mostly hydrogen, to emit its characteristic red light. Around the red emission nebula the gas contains many dust grains which preferentially reflect the blue component of starlight, and to the north (top) of the nebula can be seen a bright star which illuminates part of the dust to create a region of blue reflection. In some parts of the nebula there are so many dust grains that they hide the glowing gas, producing the three dark lanes which give the object its name. Trifid is located in Sagittarius constellation between 5000 and 10 000 light - years away

R. Jay GaBany

PIX4619560

Irregular Galaxy IC 5152 in the Indian - A nearby galaxy, IC 5152 - IC 5152 is an irregular galaxy located about 5.8 million years ago - light. In the foreground, a star in our galaxy of 8th magnitude. Image made in 1982 with the 3.9m telescope of Siding Spring. This small blue galaxy is resolved into stars in this deep AAT picture, which means that it is relatively nearby. However despite its proximity, it is probably just beyond the Local Group, which is a loose collection of 30 or so galaxies within 2 or 3 million light years of the Milky Way. Apart from the Milky Way and the similarly massive M31 galaxy in Andromeda, most of our immediate extra - galactic neighbours are light - weight collections of stars and gas like IC 5152, though few (except the Large Magellanic Cloud) show such strong evidence of recent star formation The bright object which appears at the eastern end of the galaxy is an 8th magnitude blue star in the Milky Way

Irregular Galaxy IC 5152 in the Indian - A nearby galaxy, IC 5152 - IC 5152 is an irregular galaxy located about 5.8 million years ago - light. In the foreground, a star in our galaxy of 8th magnitude. Image made in 1982 with the 3.9m telescope of Siding Spring. This small blue galaxy is resolved into stars in this deep AAT picture, which means that it is relatively nearby. However despite its proximity, it is probably just beyond the Local Group, which is a loose collection of 30 or so galaxies within 2 or 3 million light years of the Milky Way. Apart from the Milky Way and the similarly massive M31 galaxy in Andromeda, most of our immediate extra - galactic neighbours are light - weight collections of stars and gas like IC 5152, though few (except the Large Magellanic Cloud) show such strong evidence of recent star formation The bright object which appears at the eastern end of the galaxy is an 8th magnitude blue star in the Milky Way

PIX4613299

Planetary nebula Helix (NGC 7293) in Aquarius - Planetary nebula Helix (NGC 7293) - This nebula is located 690 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope This faint object is the nearest planetary nebula to the Sun and on deep photographs has a diameter of about half a degree - - the same apparent size as the Sun in the sky. The AAT colour picture shows the brighter parts of the nebula, revealing various ionization levels within the shell of matter ejected from the central star. This picture was made without unsharp masking. Unsharp masking emphasises the smallest of the radial blobs inside the red shell, which are about 150 astronomical units across (150 times the Earth - Sun distance). These radial streaks give this beautiful object its alternative name, the Sunflower Nebula. The Helix is about 400 light years away, or about 100 times more distant than the nearest stars

Planetary nebula Helix (NGC 7293) in Aquarius - Planetary nebula Helix (NGC 7293) - This nebula is located 690 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope This faint object is the nearest planetary nebula to the Sun and on deep photographs has a diameter of about half a degree - - the same apparent size as the Sun in the sky. The AAT colour picture shows the brighter parts of the nebula, revealing various ionization levels within the shell of matter ejected from the central star. This picture was made without unsharp masking. Unsharp masking emphasises the smallest of the radial blobs inside the red shell, which are about 150 astronomical units across (150 times the Earth - Sun distance). These radial streaks give this beautiful object its alternative name, the Sunflower Nebula. The Helix is about 400 light years away, or about 100 times more distant than the nearest stars

PIX4623608

Les Dentelles du Cygne - Detail - NGC 6960 - The Veil Nebula, NGC 6960 - Part of the rest of the supernova of the Dentelles du Swan lies about 1500 years - light from Earth. Ten thousand years ago a star exploded. The supernova remnant is called the Veil Nebula. Here is the west end of the Veil Nebula known as NGC 6960 or the Witch's Broom Nebula. The rampaging gas gains its colors by impacting and exciting existing nearby gas. The supernova remnant lies about 1,400 light - years away towards the constellation of Cygnus. The bright star 52 Cygnus is visible with the unaided eye from a dark location but unrelated to the ancient supernova. The filaments in the right upper portion of the image is commonly called Pickering's Triangle. It was discovered in 1904 by Williamina Fleming of the Harvard Observatory while examining photographic plates of the region. The object was named in honor of her boss, astronomer Edward Charles Pickering

Les Dentelles du Cygne - Detail - NGC 6960 - The Veil Nebula, NGC 6960 - Part of the rest of the supernova of the Dentelles du Swan lies about 1500 years - light from Earth. Ten thousand years ago a star exploded. The supernova remnant is called the Veil Nebula. Here is the west end of the Veil Nebula known as NGC 6960 or the Witch's Broom Nebula. The rampaging gas gains its colors by impacting and exciting existing nearby gas. The supernova remnant lies about 1,400 light - years away towards the constellation of Cygnus. The bright star 52 Cygnus is visible with the unaided eye from a dark location but unrelated to the ancient supernova. The filaments in the right upper portion of the image is commonly called Pickering's Triangle. It was discovered in 1904 by Williamina Fleming of the Harvard Observatory while examining photographic plates of the region. The object was named in honor of her boss, astronomer Edward Charles Pickering

Tom Davis

PIX4582769

Marble sundial decorated with feline paws, and vegetable motif in relief, from House of the Golden Cupids, Pompei

Marble sundial decorated with feline paws, and vegetable motif in relief, from House of the Golden Cupids, Pompei

DGA543148

Spiral galaxy M77 in the Whale - Active galaxy M77 (NGC 1068) in Cetus - M77 (NGC 1068). This active galaxy is the typical example of a Seyfert II galaxy. It has an active core and houses a massive black hole. She is the object of intense star formation in her spiral arms. NGC 1068 is around 50 million years of light from Earth. Image obtained by Siding Spring's 3.9m telescope. M77 is a Seyfert galaxy, a class of galaxy named for Karl Seyfert who first identified galaxies with emission lines superimposed on the normal radiation from their nuclei in 1943. Such galaxies are a subset of an ill - defined species generally known as 'active galaxies' whose nuclei emit radio - and X - radiation as well as visible light. The least active of the active galaxies are the Seyferts, the most active are the quasars which are mostly so distant that they can only be distinguished from stars by their spectrum. <BR>The common feature of these galaxy types is a small, very bright nucleus thought to host

Spiral galaxy M77 in the Whale - Active galaxy M77 (NGC 1068) in Cetus - M77 (NGC 1068). This active galaxy is the typical example of a Seyfert II galaxy. It has an active core and houses a massive black hole. She is the object of intense star formation in her spiral arms. NGC 1068 is around 50 million years of light from Earth. Image obtained by Siding Spring's 3.9m telescope. M77 is a Seyfert galaxy, a class of galaxy named for Karl Seyfert who first identified galaxies with emission lines superimposed on the normal radiation from their nuclei in 1943. Such galaxies are a subset of an ill - defined species generally known as 'active galaxies' whose nuclei emit radio - and X - radiation as well as visible light. The least active of the active galaxies are the Seyferts, the most active are the quasars which are mostly so distant that they can only be distinguished from stars by their spectrum. <BR>The common feature of these galaxy types is a small, very bright nucleus thought to host

PIX4609570

Globular cluster M71 in the Fleche - Globular cluster M71 in Sagitta - M71 is located about 12,000 light years away from Earth. Image of the central region of the cluster obtained by the Hubble space telescope. This NASA/ESA Hubble Space Telescope image shows a bright scattering of stars in the small constellation of Sagitta (the Arrow). This is the centre of the globular cluster Messier 71, a great ball of ancient stars on the edge of our galaxy around 13,000 light - years from Earth. M71 is around 27 light - years across. Globular clusters are like galactic suburbs, pockets of stars that exist on the edge of major galaxies. These clusters are tightly bound together by their gravitational attraction, hence their spherical shape and their name: globulus means little sphere”” in Latin. Around 150 such globular clusters are known to exist around our Milky Way, each one of them containing several hundred thousand stars. Despite being a familiar object, Messier 71's precise nature was disp

Globular cluster M71 in the Fleche - Globular cluster M71 in Sagitta - M71 is located about 12,000 light years away from Earth. Image of the central region of the cluster obtained by the Hubble space telescope. This NASA/ESA Hubble Space Telescope image shows a bright scattering of stars in the small constellation of Sagitta (the Arrow). This is the centre of the globular cluster Messier 71, a great ball of ancient stars on the edge of our galaxy around 13,000 light - years from Earth. M71 is around 27 light - years across. Globular clusters are like galactic suburbs, pockets of stars that exist on the edge of major galaxies. These clusters are tightly bound together by their gravitational attraction, hence their spherical shape and their name: globulus means little sphere”” in Latin. Around 150 such globular clusters are known to exist around our Milky Way, each one of them containing several hundred thousand stars. Despite being a familiar object, Messier 71's precise nature was disp

PIX4565068

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20/NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Image obtained with a bezel Astro - Physics 130 EDT, 12x6min of poses. M20, The Trifid Nebula, in the constellation of Sagittarius, is a remarkable object - large, bright and beautiful. It is a complex of red emission, blue reflection, and dark nebulae about the size of the full moon. It was shot at 1,000 mm of focal length with 130 mm of aperture at f/8 (Astro - Physics 130EDT apochromatic refractor) with a Canon 20Da DSLR and only 12 x 6 minutes of exposure at ISO 1600

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20/NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Image obtained with a bezel Astro - Physics 130 EDT, 12x6min of poses. M20, The Trifid Nebula, in the constellation of Sagittarius, is a remarkable object - large, bright and beautiful. It is a complex of red emission, blue reflection, and dark nebulae about the size of the full moon. It was shot at 1,000 mm of focal length with 130 mm of aperture at f/8 (Astro - Physics 130EDT apochromatic refractor) with a Canon 20Da DSLR and only 12 x 6 minutes of exposure at ISO 1600

Jerry Lodriguss

PIX4619514

Planetary nebula Helix (NGC 7293) in Aquarius - Planetary nebula Helix (NGC 7293) - This nebula is located 690 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope This faint object is the nearest planetary nebula to the Sun and on deep photographs has a diameter of about half a degree - - the same apparent size as the Sun in the sky. The AAT colour picture shows the brighter parts of the nebula, revealing various ionization levels within the shell of matter ejected from the central star. The greenish middle portion is evidence of excited oxygen atoms, while the outer red is predominantly light from nitrogen and hydrogen. The smallest of the radial blobs inside the red shell are about 150 astronomical units across (150 times the Earth - Sun distance) and they give this beautiful object its alternative name, the Sunflower Nebula. The Helix is about 400 light years away, or about 100 times more distant than the nearest stars

Planetary nebula Helix (NGC 7293) in Aquarius - Planetary nebula Helix (NGC 7293) - This nebula is located 690 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope This faint object is the nearest planetary nebula to the Sun and on deep photographs has a diameter of about half a degree - - the same apparent size as the Sun in the sky. The AAT colour picture shows the brighter parts of the nebula, revealing various ionization levels within the shell of matter ejected from the central star. The greenish middle portion is evidence of excited oxygen atoms, while the outer red is predominantly light from nitrogen and hydrogen. The smallest of the radial blobs inside the red shell are about 150 astronomical units across (150 times the Earth - Sun distance) and they give this beautiful object its alternative name, the Sunflower Nebula. The Helix is about 400 light years away, or about 100 times more distant than the nearest stars

PIX4623642

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20 or NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope. Trifid nebula is located in Sagittarius constellation between 5000 and 10 000 light - years away. Stars, the Sun included, were born within clouds of dusty gas such as the Trifid Nebula. Within it a number of young hot stars have already formed. The hottest cause the gas, mostly hydrogen, to emit its characteristic red light. Around the red emission nebula the gas contains many dust grains which preferentially reflect the blue component of starlight, and to the north (top) of the nebula can be seen a bright star which illuminates part of the dust to create a region of blue reflection. In some parts of the nebula there are so many dust grains that they hide the glowing gas, producing the three dark lanes which gi

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20 or NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope. Trifid nebula is located in Sagittarius constellation between 5000 and 10 000 light - years away. Stars, the Sun included, were born within clouds of dusty gas such as the Trifid Nebula. Within it a number of young hot stars have already formed. The hottest cause the gas, mostly hydrogen, to emit its characteristic red light. Around the red emission nebula the gas contains many dust grains which preferentially reflect the blue component of starlight, and to the north (top) of the nebula can be seen a bright star which illuminates part of the dust to create a region of blue reflection. In some parts of the nebula there are so many dust grains that they hide the glowing gas, producing the three dark lanes which gi

PIX4619434

Spiral galaxies NGC 3314 A and B in Hydra - Galaxy pair NGC 3314 in Hydra - NGC 3314 is a pair of spiral galaxies distant about 140 million years - Earth light. These galaxies are not interacting but just perfectly aligned in front of each other from Earth. Through an extraordinary chance alignment, a face - on spiral galaxy lies precisely in front of another larger spiral. This line - up provides us with the rare chance to visualize dark material within the front galaxy, seen only because it is silhouetted against the object behind it. NGC 3314 lies about 140 million light - years from Earth, in the direction of the southern hemisphere constellation Hydra. The bright blue stars forming a pinwheel shape near the center of the front galaxy have formed recently from interstellar gas and dust. In many galaxies, interstellar dust lies only in the same regions as recently formed blue stars. However, in the foreground galaxy, NGC 3314a, there are numerous additional dark dust lanes that are

Spiral galaxies NGC 3314 A and B in Hydra - Galaxy pair NGC 3314 in Hydra - NGC 3314 is a pair of spiral galaxies distant about 140 million years - Earth light. These galaxies are not interacting but just perfectly aligned in front of each other from Earth. Through an extraordinary chance alignment, a face - on spiral galaxy lies precisely in front of another larger spiral. This line - up provides us with the rare chance to visualize dark material within the front galaxy, seen only because it is silhouetted against the object behind it. NGC 3314 lies about 140 million light - years from Earth, in the direction of the southern hemisphere constellation Hydra. The bright blue stars forming a pinwheel shape near the center of the front galaxy have formed recently from interstellar gas and dust. In many galaxies, interstellar dust lies only in the same regions as recently formed blue stars. However, in the foreground galaxy, NGC 3314a, there are numerous additional dark dust lanes that are

PIX4610557

The cluster of stars Pismis 24 in the Scorpio - Pismis 24 star cluster in Scorpius - This image obtained by the Hubble space telescope shows the cluster of young stars Pismis 24, located about 8000 years - light in the nebula NGC 6357 of the Scorpio. This cluster houses a star that was thought to be the most massive star in our galaxy, between 200 and 300 solar masses (the brightest star in the top center of the image). The measurements obtained by the Hubble telescope showed that this star, Pismis 24 - 1, was actually a double star and that its mass was actually only about 100 solar masses. The small open star cluster Pismis 24 lies in the core of the large emission nebula NGC 6357 in Scorpius, about 8,000 light - years away from Earth. Some of the stars in this cluster are extremely massive and emit intense ultraviolet radiation. The brightest object in the picture is designated Pismis 24 - 1. It was once thought to weigh as much as 200 to 300 solar masses. This would not only have m

The cluster of stars Pismis 24 in the Scorpio - Pismis 24 star cluster in Scorpius - This image obtained by the Hubble space telescope shows the cluster of young stars Pismis 24, located about 8000 years - light in the nebula NGC 6357 of the Scorpio. This cluster houses a star that was thought to be the most massive star in our galaxy, between 200 and 300 solar masses (the brightest star in the top center of the image). The measurements obtained by the Hubble telescope showed that this star, Pismis 24 - 1, was actually a double star and that its mass was actually only about 100 solar masses. The small open star cluster Pismis 24 lies in the core of the large emission nebula NGC 6357 in Scorpius, about 8,000 light - years away from Earth. Some of the stars in this cluster are extremely massive and emit intense ultraviolet radiation. The brightest object in the picture is designated Pismis 24 - 1. It was once thought to weigh as much as 200 to 300 solar masses. This would not only have m

PIX4569076

Dark Nebula LDN 673 in Aquarius - LDN 673 dark nebula in Aquila - This telescopic close - up looks towards the region at a fragmented Aquila dark cloud complex identified as LDN 673, stretching across a field of view slightly wider than the full moon. In the scene, visible indications of energetic outflows associated with young stars include the small red tinted nebulosity RNO 109 at top left and Herbig - Haro object HH32 above and right of center. The dark clouds in Aquila are estimated to be some 600 light - years away

Dark Nebula LDN 673 in Aquarius - LDN 673 dark nebula in Aquila - This telescopic close - up looks towards the region at a fragmented Aquila dark cloud complex identified as LDN 673, stretching across a field of view slightly wider than the full moon. In the scene, visible indications of energetic outflows associated with young stars include the small red tinted nebulosity RNO 109 at top left and Herbig - Haro object HH32 above and right of center. The dark clouds in Aquila are estimated to be some 600 light - years away

Adam Block

PIX4621654

Spiral galaxy M77 in the Whale - Active galaxy M77 (NGC 1068) in Cetus - This active galaxy is the typical example of a galaxy of Seyfert II. M77 (NGC 1068) has an active core and houses a massive black hole. She is the object of intense star formation in her spiral arms. NGC 1068 is around 50 million years of light from Earth. Image obtained with a telescope of 50 cm and more than 17 hours of installation. Located about 60 million light years from Earth, towards the direction of the constellation named Cetus, is an enormous galaxy, much larger than our own, that is surrounded by a even larger cloud of obscuring dust. M77 (NGC 1068) has a powerful jet pouring copious amounts of material into inter - galactic space at enormous speed. This galaxy is a seyfert II type with an active nucleus. It is now believed that the source of this commotion is a super - massive black hole, ten million times more massive than our Sun, in the process of absorbing material that has ventured too close

Spiral galaxy M77 in the Whale - Active galaxy M77 (NGC 1068) in Cetus - This active galaxy is the typical example of a galaxy of Seyfert II. M77 (NGC 1068) has an active core and houses a massive black hole. She is the object of intense star formation in her spiral arms. NGC 1068 is around 50 million years of light from Earth. Image obtained with a telescope of 50 cm and more than 17 hours of installation. Located about 60 million light years from Earth, towards the direction of the constellation named Cetus, is an enormous galaxy, much larger than our own, that is surrounded by a even larger cloud of obscuring dust. M77 (NGC 1068) has a powerful jet pouring copious amounts of material into inter - galactic space at enormous speed. This galaxy is a seyfert II type with an active nucleus. It is now believed that the source of this commotion is a super - massive black hole, ten million times more massive than our Sun, in the process of absorbing material that has ventured too close

R. Jay GaBany

PIX4609596

Cotton Julius E. IV, art. 6, The 'Beauchamp Pageants', c.1483 (ink on vellum)

Cotton Julius E. IV, art. 6, The 'Beauchamp Pageants', c.1483 (ink on vellum)

Netherlandish School, (15th century)

BL3289775

Nebula NGC 6164 - 5 in the Rule - The emission nebula NGC 6164 - 65 - This nebula is located about 4000 years - light from Earth. It is a bipolar nebula around a very hot star at the end of life, the star HD 148937. Image obtained by Siding Spring's 3.9m telescope. Superficially similar to a planetary nebula, NGC 6164 - 5 is in reality a rather unusual object associated with a rather unusual star. The vivid blue central star, known only as HD 148937, is the brightest member of a triple system of stars in orbit around each other. This extremely hot star is loosing mass from its outer layers continuously, but occasionally more vigorous outbursts give rise to the symmetrical shells seen in this picture. The two catalogue numbers, NGC 6164 and 6165, refer to these shells as separate objects

Nebula NGC 6164 - 5 in the Rule - The emission nebula NGC 6164 - 65 - This nebula is located about 4000 years - light from Earth. It is a bipolar nebula around a very hot star at the end of life, the star HD 148937. Image obtained by Siding Spring's 3.9m telescope. Superficially similar to a planetary nebula, NGC 6164 - 5 is in reality a rather unusual object associated with a rather unusual star. The vivid blue central star, known only as HD 148937, is the brightest member of a triple system of stars in orbit around each other. This extremely hot star is loosing mass from its outer layers continuously, but occasionally more vigorous outbursts give rise to the symmetrical shells seen in this picture. The two catalogue numbers, NGC 6164 and 6165, refer to these shells as separate objects

PIX4619235

The dwarf planet Makemake - Illustration -The dwarf planet Makemake: The solar system seen from the dwarf planet Makemake. Makemake (136472 Makemake) is the third largest known dwarf planet. It belongs to the Kuiper belt and was discovered in 2005. Its diameter is about two thirds that of Pluto, or 1,430 km. Solar system seen from Makemake. Makemake (minor-planet designation 136472 Makemake) is a dwarf planet and perhaps the largest Kuiper belt object with a diameter approximately two thirds that of Pluto. Makemake has one known satellite, S/2015 (136472). Makemake was discovered on March 31, 2005

The dwarf planet Makemake - Illustration -The dwarf planet Makemake: The solar system seen from the dwarf planet Makemake. Makemake (136472 Makemake) is the third largest known dwarf planet. It belongs to the Kuiper belt and was discovered in 2005. Its diameter is about two thirds that of Pluto, or 1,430 km. Solar system seen from Makemake. Makemake (minor-planet designation 136472 Makemake) is a dwarf planet and perhaps the largest Kuiper belt object with a diameter approximately two thirds that of Pluto. Makemake has one known satellite, S/2015 (136472). Makemake was discovered on March 31, 2005

PIX4584252

Pluto surface - Artist view

Pluto surface - Artist view

Miller, Ron (b.1947)

PIX7223424

Pluto surface - Artist view

Pluto surface - Artist view

Miller, Ron (b.1947)

PIX7223425

Postage stamps:1978, International Philatelic Exhibition Prague, astronomical clock, 1978, Czechoslovakia, 20th century

Postage stamps:1978, International Philatelic Exhibition Prague, astronomical clock, 1978, Czechoslovakia, 20th century

DGA2582169

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) and open cluster M21 - View of the Trifide nebula (M20/NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Above it, the M21 star cluster. M20, the Trifid Nebula is a remarkable object, large, bright and beautiful. It is a complex of red emission and blue reflection nebulosity about the size of the full moon, intersected by three dark lanes, from which the Trifid gets its name. M21 is a rich open cluster comprised of some 70 stars with a large brightness range and strong central condensation, approximately 13 arc minutes in diameter and magnitude 5.9, and located 1/2 degree to the northeast of M20

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) and open cluster M21 - View of the Trifide nebula (M20/NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Above it, the M21 star cluster. M20, the Trifid Nebula is a remarkable object, large, bright and beautiful. It is a complex of red emission and blue reflection nebulosity about the size of the full moon, intersected by three dark lanes, from which the Trifid gets its name. M21 is a rich open cluster comprised of some 70 stars with a large brightness range and strong central condensation, approximately 13 arc minutes in diameter and magnitude 5.9, and located 1/2 degree to the northeast of M20

Jerry Lodriguss

PIX4619427

Galaxy clusters LCDCS - 0829 - Galaxy cluster LCDCS - 0829 - Gravitational lenses in the galaxy cluster LCDCS - 0829. Image obtained by the Hubble Space Telescope. The NASA/ESA Hubble Space Telescope usually works as a solo artist to capture awe - inspiring images of the distant Universe. For this picture, though, Hubble had a helping hand from the subject of the image, a galaxy cluster called LCDCS - 0829, as the huge mass of the galaxies in the cluster acted like a giant magnifying glass. This strange effect is called gravitational lensing. The object was discovered during the Las Campanas Distant Clusters Survey, which explains the cluster's unusual name. This survey was carried out in March 1995 using a 1 - metre telescope at the Las Campanas Observatory in Chile. More than one thousand clusters of galaxies, most of them previously unknown, were found in a dedicated survey of a long, but narrow, section of the southern sky. The bizarre phenomenon of gravitational lensing is a conse

Galaxy clusters LCDCS - 0829 - Galaxy cluster LCDCS - 0829 - Gravitational lenses in the galaxy cluster LCDCS - 0829. Image obtained by the Hubble Space Telescope. The NASA/ESA Hubble Space Telescope usually works as a solo artist to capture awe - inspiring images of the distant Universe. For this picture, though, Hubble had a helping hand from the subject of the image, a galaxy cluster called LCDCS - 0829, as the huge mass of the galaxies in the cluster acted like a giant magnifying glass. This strange effect is called gravitational lensing. The object was discovered during the Las Campanas Distant Clusters Survey, which explains the cluster's unusual name. This survey was carried out in March 1995 using a 1 - metre telescope at the Las Campanas Observatory in Chile. More than one thousand clusters of galaxies, most of them previously unknown, were found in a dedicated survey of a long, but narrow, section of the southern sky. The bizarre phenomenon of gravitational lensing is a conse

PIX4565707

Barree spiral galaxy NGC 6872 in interaction with IC 4970 in the Peacock - Barred spiral interacting galaxy NGC 6872 in Pavo - The barree spiral galaxy NGC 6872 and lenticular IC 4970 are located about 300 million years away - light from Earth. NGC 6872 extends over nearly 750,000 years - light. Image obtained by the ANTU telescope of the VLT on March 29, 1999. View of the spectacular barred spiral galaxy NGC 6872 obtained with FORS1 at ANTU telescope (VLT) in the morning of March 29, 1999. It is of type SBB and is accompanied by a smaller, interacting galaxy, IC 4970 of type S0 (just above the centre). The bright object to the lower right of the galaxies is a star in the Milky Way whose image has been strongly overexposed and exhibits multiple optical reflections in the telescope and instrument. There are also many other, fainter and more distant galaxies of many different forms in the field. The upper left spiral arm of NGC 6872 is significantly disturbed and is populated by a pletho

Barree spiral galaxy NGC 6872 in interaction with IC 4970 in the Peacock - Barred spiral interacting galaxy NGC 6872 in Pavo - The barree spiral galaxy NGC 6872 and lenticular IC 4970 are located about 300 million years away - light from Earth. NGC 6872 extends over nearly 750,000 years - light. Image obtained by the ANTU telescope of the VLT on March 29, 1999. View of the spectacular barred spiral galaxy NGC 6872 obtained with FORS1 at ANTU telescope (VLT) in the morning of March 29, 1999. It is of type SBB and is accompanied by a smaller, interacting galaxy, IC 4970 of type S0 (just above the centre). The bright object to the lower right of the galaxies is a star in the Milky Way whose image has been strongly overexposed and exhibits multiple optical reflections in the telescope and instrument. There are also many other, fainter and more distant galaxies of many different forms in the field. The upper left spiral arm of NGC 6872 is significantly disturbed and is populated by a pletho

PIX4613035

Las Campanas Observatory - Magellan Telescope - Las Campanas Observatory - Star line above Magellan telescopes measuring 6.5 meters in diameter. The bright object in the sky is Jupiter Planet. Star trail above the 6.5 meter Magellan twin telescopes in Las Campanas observatory, Chile. Bright object in the sky is Jupiter

Las Campanas Observatory - Magellan Telescope - Las Campanas Observatory - Star line above Magellan telescopes measuring 6.5 meters in diameter. The bright object in the sky is Jupiter Planet. Star trail above the 6.5 meter Magellan twin telescopes in Las Campanas observatory, Chile. Bright object in the sky is Jupiter

Alex Tudorica

PIX4654237

Las Campanas Observatory - Magellan Telescope - Las Campanas Observatory - Star line above Magellan telescopes measuring 6.5 meters in diameter. The bright object in the sky is Jupiter Planet. Star trail above the 6.5 meter Magellan twin telescopes in Las Campanas observatory, Chile. Bright object in the sky is Jupiter

Las Campanas Observatory - Magellan Telescope - Las Campanas Observatory - Star line above Magellan telescopes measuring 6.5 meters in diameter. The bright object in the sky is Jupiter Planet. Star trail above the 6.5 meter Magellan twin telescopes in Las Campanas observatory, Chile. Bright object in the sky is Jupiter

Alex Tudorica

PIX4654250

Astronomy, miniature from a treatise on astrology, Latin manuscript, Italy 14th Century.

Astronomy, miniature from a treatise on astrology, Latin manuscript, Italy 14th Century.

DGA519603

Celestial globe, the stars are represented by different symbols, but the magnitude table is absent, c.1757 (plaster)

Celestial globe, the stars are represented by different symbols, but the magnitude table is absent, c.1757 (plaster)

Ferguson, James (1710-76)

MMM5468738

Globular cluster M54 in Sagittarius - Globular cluster M54 in Sagittarius - The globular cluster M54 photographed by the Hubble space telescope (HST). M54 resides about 90,000 light years from Earth, in the dwarf galaxy of Sagittarius. The object shown in this beautiful Hubble image, dubbed Messier 54, could be just another globular cluster, but this dense and faint group of stars was in fact the first globular cluster found that is outside our galaxy. Discovered by the famous astronomer Charles Messier in 1778, Messier 54 belongs to a satellite of the Milky Way called the Sagittarius Dwarf Elliptical Galaxy. Messier had no idea of the significance of his discovery at the time, and it wasn't until over two centuries later, in 1994, that astronomers found Messier 54 to be part of the miniature galaxy and not our own. Current estimates indicate that the Sagittarius dwarf, and hence the cluster, is situated almost 90 000 light - years away - - more than three times as far from the centre

Globular cluster M54 in Sagittarius - Globular cluster M54 in Sagittarius - The globular cluster M54 photographed by the Hubble space telescope (HST). M54 resides about 90,000 light years from Earth, in the dwarf galaxy of Sagittarius. The object shown in this beautiful Hubble image, dubbed Messier 54, could be just another globular cluster, but this dense and faint group of stars was in fact the first globular cluster found that is outside our galaxy. Discovered by the famous astronomer Charles Messier in 1778, Messier 54 belongs to a satellite of the Milky Way called the Sagittarius Dwarf Elliptical Galaxy. Messier had no idea of the significance of his discovery at the time, and it wasn't until over two centuries later, in 1994, that astronomers found Messier 54 to be part of the miniature galaxy and not our own. Current estimates indicate that the Sagittarius dwarf, and hence the cluster, is situated almost 90 000 light - years away - - more than three times as far from the centre

PIX4565011

A diagram of lunar phases

A diagram of lunar phases

BL3296770

Planetary Nebula of the Red Rectangle in the Unicorn - The Red Rectangle, AFGL 915 - This planetary nebula is located about 2300 years ago - light. Image from Siding Spring 3.9m Telescope This surprising object is one of an unusual class of nebulae surrounding mature, sun - like stars that are about to turn into planetary nebulae. Not all pre - planetary nebulae have outbursts like this, and in those that do, the nebula lasts only a few thousand years, hence the rarity. The central star has a thick belt of dust like a girdle around its equator which restricts outflow in that direction. Instead, the star ejects material in a kind of cone from each of its poles. The spectrum of the nebula shows unusual, strong red lines from hydrogen bonded to grains of carbon, however there is sufficient light reflected from the embedded star to dilute the strong red spectrum to the deep yellow we see here

Planetary Nebula of the Red Rectangle in the Unicorn - The Red Rectangle, AFGL 915 - This planetary nebula is located about 2300 years ago - light. Image from Siding Spring 3.9m Telescope This surprising object is one of an unusual class of nebulae surrounding mature, sun - like stars that are about to turn into planetary nebulae. Not all pre - planetary nebulae have outbursts like this, and in those that do, the nebula lasts only a few thousand years, hence the rarity. The central star has a thick belt of dust like a girdle around its equator which restricts outflow in that direction. Instead, the star ejects material in a kind of cone from each of its poles. The spectrum of the nebula shows unusual, strong red lines from hydrogen bonded to grains of carbon, however there is sufficient light reflected from the embedded star to dilute the strong red spectrum to the deep yellow we see here

PIX4623779

Active galaxy NGC 1068 in the Whale - Composite X - visible - Active galaxy NGC 1068 seen in visible and X - ray - This visible X composite image shows that a strong stellar wind escapes from the heart of the galaxy NGC 1068. This active galaxy houses a massive black hole and is the object of intense star formation in its spiral arms. NGC 1068 stands at about 50 million years - light. Image obtained by the Chandra satellite in December 2000. This composite X - ray (blue and green) and optical (red) image of the active galaxy, NGC 1068, shows gas blowing away in a high - speed wind from the vicinity of a central supermassive black hole. Regions of intense star formation in the inner spiral arms of the galaxy are highlighted by both optical and X - ray emission

Active galaxy NGC 1068 in the Whale - Composite X - visible - Active galaxy NGC 1068 seen in visible and X - ray - This visible X composite image shows that a strong stellar wind escapes from the heart of the galaxy NGC 1068. This active galaxy houses a massive black hole and is the object of intense star formation in its spiral arms. NGC 1068 stands at about 50 million years - light. Image obtained by the Chandra satellite in December 2000. This composite X - ray (blue and green) and optical (red) image of the active galaxy, NGC 1068, shows gas blowing away in a high - speed wind from the vicinity of a central supermassive black hole. Regions of intense star formation in the inner spiral arms of the galaxy are highlighted by both optical and X - ray emission

PIX4609567

Brown dwarf star Teide 1 - Brown dwarf Teide 1 - Artist view of the brown dwarf star Teide 1. Discovered in 1995 in the Pleiades cluster, about 55 times the mass of Jupiter, this brown dwarf is represented here in the sky of a young exoplanet lit by the star. This is how Teide 1 might appear from the surface of a hypothetical, March - like planet. Discovered in 1995, Teide 1 is a type of mysterious object called a brown dwarf (failed star or super planet). Bigger than a planet, but smaller than a star, this brown dwarf is about 400 light years from the Earth in the Pleiades star cluster. It is thought that Teide 1 has the mass equivalent of about 55 Jupiters, which is considered large for a brown dwarf. Teide 1 is massive enough, and hence hot enough, to sustain lithium fusion in its core, but is unable to initiate hydrogen fusion like our sun. Teide 1 is probably only about 120 million years old (compared to our sun's age of 4.5 billion years) and shines at a temperature of 4,000o F,

Brown dwarf star Teide 1 - Brown dwarf Teide 1 - Artist view of the brown dwarf star Teide 1. Discovered in 1995 in the Pleiades cluster, about 55 times the mass of Jupiter, this brown dwarf is represented here in the sky of a young exoplanet lit by the star. This is how Teide 1 might appear from the surface of a hypothetical, March - like planet. Discovered in 1995, Teide 1 is a type of mysterious object called a brown dwarf (failed star or super planet). Bigger than a planet, but smaller than a star, this brown dwarf is about 400 light years from the Earth in the Pleiades star cluster. It is thought that Teide 1 has the mass equivalent of about 55 Jupiters, which is considered large for a brown dwarf. Teide 1 is massive enough, and hence hot enough, to sustain lithium fusion in its core, but is unable to initiate hydrogen fusion like our sun. Teide 1 is probably only about 120 million years old (compared to our sun's age of 4.5 billion years) and shines at a temperature of 4,000o F,

Walter B Myers

PIX4572545

Globular cluster NGC 6401 in Ophiuchus - Globular cluster NGC 6401 in Ophiuchus - The NASA/ESA Hubble Space Telescope has used its powerful optics to separate the globular cluster NGC 6401 into its constituent stars. What was once only visible as a ghostly mist in the eyepieces of astronomical instruments has been transformed into a stunning stellar landscape. NGC 6401 can be found within the constellation of Ophiuchus (The Serpent Bearer). The globular cluster itself is relatively faint, so a telescope and some observational experience are required to see it. Globular clusters are very rich, and generally spherical, collections of stars, hence the name. They orbit the cores of galaxies, with the force of gravity also keeping the stars bound as a group. There are around 160 globular clusters associated with our Milky Way, of which NGC 6401 is one. These objects are very old, containing some of the most ancient stars known. However, there are many mysteries surrounding them, with the or

Globular cluster NGC 6401 in Ophiuchus - Globular cluster NGC 6401 in Ophiuchus - The NASA/ESA Hubble Space Telescope has used its powerful optics to separate the globular cluster NGC 6401 into its constituent stars. What was once only visible as a ghostly mist in the eyepieces of astronomical instruments has been transformed into a stunning stellar landscape. NGC 6401 can be found within the constellation of Ophiuchus (The Serpent Bearer). The globular cluster itself is relatively faint, so a telescope and some observational experience are required to see it. Globular clusters are very rich, and generally spherical, collections of stars, hence the name. They orbit the cores of galaxies, with the force of gravity also keeping the stars bound as a group. There are around 160 globular clusters associated with our Milky Way, of which NGC 6401 is one. These objects are very old, containing some of the most ancient stars known. However, there are many mysteries surrounding them, with the or

PIX4564826

Planetary nebula Helix (NGC 7293) in Aquarius - Planetary nebula Helix (NGC 7293) - This nebula is located 690 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope This faint object is the nearest planetary nebula to the Sun and on deep photographs has a diameter of about half a degree - - the same apparent size as the Sun in the sky. The AAT colour picture shows the brighter parts of the nebula, revealing various ionization levels within the shell of matter ejected from the central star. The greenish middle portion is evidence of excited oxygen atoms, while the outer red is predominantly light from nitrogen and hydrogen. The smallest of the radial blobs inside the red shell are about 150 astronomical units across (150 times the Earth - Sun distance) and they give this beautiful object its alternative name, the Sunflower Nebula. The Helix is about 400 light years away, or about 100 times more distant than the nearest stars

Planetary nebula Helix (NGC 7293) in Aquarius - Planetary nebula Helix (NGC 7293) - This nebula is located 690 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope This faint object is the nearest planetary nebula to the Sun and on deep photographs has a diameter of about half a degree - - the same apparent size as the Sun in the sky. The AAT colour picture shows the brighter parts of the nebula, revealing various ionization levels within the shell of matter ejected from the central star. The greenish middle portion is evidence of excited oxygen atoms, while the outer red is predominantly light from nitrogen and hydrogen. The smallest of the radial blobs inside the red shell are about 150 astronomical units across (150 times the Earth - Sun distance) and they give this beautiful object its alternative name, the Sunflower Nebula. The Helix is about 400 light years away, or about 100 times more distant than the nearest stars

PIX4623637

Around the Tarantula Nebula - Around the Tarantula nebula in the Large Magellanic Cloud - The Tarantula Nebula (or 30 Bream) is the largest star-forming region of the Great Magellan Cloud. It is located 170,000 light years ago in the constellation Dorado (southern hemisphere). At the center of this nebula, the open cluster of R136 stars, clusters of hot and massive stars. Image obtained with the 1.2m Schmidt UK Telescope from Siding Spring. In this picture we see the eastern end of the Large Magellanic Cloud where lies one of the most active star formation regions known. If this enormous complex of stars, gas and dust were at the distance of the better - known Orion Nebula the brightest parts of it would visible during the day and would cover a quarter of the sky at night. While the Orion Nebula contains a mere handful of the hot blue stars which energise it, the Tarantula nebula has spawned many thousands in the bright central region, which surrounds a compact, brilliant cluster known

Around the Tarantula Nebula - Around the Tarantula nebula in the Large Magellanic Cloud - The Tarantula Nebula (or 30 Bream) is the largest star-forming region of the Great Magellan Cloud. It is located 170,000 light years ago in the constellation Dorado (southern hemisphere). At the center of this nebula, the open cluster of R136 stars, clusters of hot and massive stars. Image obtained with the 1.2m Schmidt UK Telescope from Siding Spring. In this picture we see the eastern end of the Large Magellanic Cloud where lies one of the most active star formation regions known. If this enormous complex of stars, gas and dust were at the distance of the better - known Orion Nebula the brightest parts of it would visible during the day and would cover a quarter of the sky at night. While the Orion Nebula contains a mere handful of the hot blue stars which energise it, the Tarantula nebula has spawned many thousands in the bright central region, which surrounds a compact, brilliant cluster known

PIX4618257

Solar quadrant of the Andalusi astronomer Ahmad ibn A.S.-.Saffar (10th-11th c.). Made in white marble. Photography. SPAIN. ANDALUSIA. Cordoba. Archaeological Museum of Cordoba

Solar quadrant of the Andalusi astronomer Ahmad ibn A.S.-.Saffar (10th-11th c.). Made in white marble. Photography. SPAIN. ANDALUSIA. Cordoba. Archaeological Museum of Cordoba

Rotger

CUL4938550

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20 or NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope. Trifid nebula is located in Sagittarius constellation between 5000 and 10 000 light - years away. Stars, the Sun included, were born within clouds of dusty gas such as the Trifid Nebula. Within it a number of young hot stars have already formed. The hottest cause the gas, mostly hydrogen, to emit its characteristic red light. Around the red emission nebula the gas contains many dust grains which preferentially reflect the blue component of starlight, and to the north (top) of the nebula can be seen a bright star which illuminates part of the dust to create a region of blue reflection. In some parts of the nebula there are so many dust grains that they hide the glowing gas, producing the three dark lanes which gi

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20 or NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Image obtained by Siding Spring's 3.9m telescope. Trifid nebula is located in Sagittarius constellation between 5000 and 10 000 light - years away. Stars, the Sun included, were born within clouds of dusty gas such as the Trifid Nebula. Within it a number of young hot stars have already formed. The hottest cause the gas, mostly hydrogen, to emit its characteristic red light. Around the red emission nebula the gas contains many dust grains which preferentially reflect the blue component of starlight, and to the north (top) of the nebula can be seen a bright star which illuminates part of the dust to create a region of blue reflection. In some parts of the nebula there are so many dust grains that they hide the glowing gas, producing the three dark lanes which gi

PIX4619538

Nebulae NGC 6334 and NGC 6357 in Scorpio - Nebulae NGC 6334 and NGC 6357 in Scorpius: These nebulae are located about 5500 light years from Earth - Located in the constellation of Scorpius, the Cat's Paw Nebula resemble a faint, luminous paw-print on the sky. Deep images reveal that the nebula is about a degree across in the sky. At a distance of about 5500 light-years away it is a truly vast structure spanning almost 100 light-years across. The sculpted gases of NGC 6334 are illuminated by the light of numerous powerful stars, some exceeding 10 solar masses. The two brilliant blue stars in the upper left are Lambda and Kappa Scorpii. Many of these luminous hot stars are surprisingly not visible because they lie within the dusty plane of our galaxy. At infrared wavelengths the numerous hot stars are revealed and the nature of this object as a region of massive star formation becomes clear. In the past decade water masers, molecular outflows, and x-ray sources have provided direct evide

Nebulae NGC 6334 and NGC 6357 in Scorpio - Nebulae NGC 6334 and NGC 6357 in Scorpius: These nebulae are located about 5500 light years from Earth - Located in the constellation of Scorpius, the Cat's Paw Nebula resemble a faint, luminous paw-print on the sky. Deep images reveal that the nebula is about a degree across in the sky. At a distance of about 5500 light-years away it is a truly vast structure spanning almost 100 light-years across. The sculpted gases of NGC 6334 are illuminated by the light of numerous powerful stars, some exceeding 10 solar masses. The two brilliant blue stars in the upper left are Lambda and Kappa Scorpii. Many of these luminous hot stars are surprisingly not visible because they lie within the dusty plane of our galaxy. At infrared wavelengths the numerous hot stars are revealed and the nature of this object as a region of massive star formation becomes clear. In the past decade water masers, molecular outflows, and x-ray sources have provided direct evide

R. Gendler

PIX4619391

Planetary nebula Shapley 1 in the Rule - The planetary nebula Shapley 1 - This planetary nebula is located about 1000 years ago - light. Image obtained from the 3.9m telescope of Siding Spring This is an unusual annular planetary nebula in Norma. The nebula itself appears quite small at a little over an arc minute in diameter, while its central star is a magnitude 14 white dwarf. This object is unusual because those planetaries that are not bipolar are more or less spherical shells of material thrown off by the central star as it undergoes an internal rearrangement. We often see them as thick annuli because we look through a greater thickness at the edge of the shell. However, Shapley 1 seems to be a true torus, a doughnut - shaped ring of material that we happen to see face - on around the central star. Sp - 1 is about 1000 light years distant

Planetary nebula Shapley 1 in the Rule - The planetary nebula Shapley 1 - This planetary nebula is located about 1000 years ago - light. Image obtained from the 3.9m telescope of Siding Spring This is an unusual annular planetary nebula in Norma. The nebula itself appears quite small at a little over an arc minute in diameter, while its central star is a magnitude 14 white dwarf. This object is unusual because those planetaries that are not bipolar are more or less spherical shells of material thrown off by the central star as it undergoes an internal rearrangement. We often see them as thick annuli because we look through a greater thickness at the edge of the shell. However, Shapley 1 seems to be a true torus, a doughnut - shaped ring of material that we happen to see face - on around the central star. Sp - 1 is about 1000 light years distant

PIX4623906

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20/NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Measuring some forty light years across, this nebula contains enough gas to make many thousands of suns. Within it a number of young hot stars have already formed. The hottest cause the gas, mostly hydrogen, to emit its characteristic red light. Around the red emission nebula the gas contains many dust grains which preferentially reflect the blue component of starlight, and to the north (top) of the nebula can be seen a bright star which illuminates part of the dust to create a region of blue reflection. In some parts of the nebula there are so many dust grains that they hide the glowing gas, producing the three dark lanes which give the object its name. Trifid is located in Sagittarius constellation between 5000 and 10 000 light - years away

Nebula Trifide (M20) in the constellation Sagittarius - Trifid nebula (M20) in Sagittarius - View of the Trifide nebula (M20/NGC 6514) located in the constellation Sagittarius between 5000 and 10,000 years - light from Earth. Measuring some forty light years across, this nebula contains enough gas to make many thousands of suns. Within it a number of young hot stars have already formed. The hottest cause the gas, mostly hydrogen, to emit its characteristic red light. Around the red emission nebula the gas contains many dust grains which preferentially reflect the blue component of starlight, and to the north (top) of the nebula can be seen a bright star which illuminates part of the dust to create a region of blue reflection. In some parts of the nebula there are so many dust grains that they hide the glowing gas, producing the three dark lanes which give the object its name. Trifid is located in Sagittarius constellation between 5000 and 10 000 light - years away

R. Gendler

PIX4619498

Drawing of Perseus holding Medusa's severed head, with red dots for the constellations, illustration from 'Phaenomena' (also known as the Aratea) (vellum)

Drawing of Perseus holding Medusa's severed head, with red dots for the constellations, illustration from 'Phaenomena' (also known as the Aratea) (vellum)

French School, (10th century)

BL3114999

Horizontal compass dial, for latitude 48 degrees. Silver and copper object, late 17th century (silver and copper)

Horizontal compass dial, for latitude 48 degrees. Silver and copper object, late 17th century (silver and copper)

MMM5469122

Universal equinoxial dial for Latitude 0, reverse Brass instrument, c.1675-1715, by Michael Butterfield (brass)

Universal equinoxial dial for Latitude 0, reverse Brass instrument, c.1675-1715, by Michael Butterfield (brass)

MMM5475096

Universal equatorial astonomic ring developed by John Rowley in 1715. Cambridge, Whipple Museum

Universal equatorial astonomic ring developed by John Rowley in 1715. Cambridge, Whipple Museum

Rowley, John (1668-1728)

Luisa Ricciarini

LRI4632438

Brass graphometer, ca 1675, by Pierre Sevin (active 1665-1683), diameter 26 cm. France, 17th century.

Brass graphometer, ca 1675, by Pierre Sevin (active 1665-1683), diameter 26 cm. France, 17th century.

DGA2583493

Constellations of Gemels and Little Dog - Constellations of Gemini and Canis Minor - Constellation of Gemels with bright stars Castor and Pollux. Below is the small constellation of the Little Dog, with the bright star Procyon. Canis Minor (the Lesser Dog) is sometimes regarded as the smaller of the two dogs of Orion the hunter. It is minor indeed, just 185 degrees square, and 71st in size of the 88 modern constellations. The most obvious and interesting object Canis Minor is its main star, the pale yellow Procyon. Its name is from the Greek, meaning 'before the dog', since it rises before the Sirius, the Dog Star. Gemini (the Twins) is a much more interesting collection of stars, easily visualised as two figures holding hands, their heads represented by the stars Castor and Pollux. The constellation is an ancient zodiacal construction, with a rich mythology vanishing in the mists of time. It is from the direction of Gemini (near Castor) that annual Geminid meteor showers radiate, arou

Constellations of Gemels and Little Dog - Constellations of Gemini and Canis Minor - Constellation of Gemels with bright stars Castor and Pollux. Below is the small constellation of the Little Dog, with the bright star Procyon. Canis Minor (the Lesser Dog) is sometimes regarded as the smaller of the two dogs of Orion the hunter. It is minor indeed, just 185 degrees square, and 71st in size of the 88 modern constellations. The most obvious and interesting object Canis Minor is its main star, the pale yellow Procyon. Its name is from the Greek, meaning 'before the dog', since it rises before the Sirius, the Dog Star. Gemini (the Twins) is a much more interesting collection of stars, easily visualised as two figures holding hands, their heads represented by the stars Castor and Pollux. The constellation is an ancient zodiacal construction, with a rich mythology vanishing in the mists of time. It is from the direction of Gemini (near Castor) that annual Geminid meteor showers radiate, arou

PIX4590674

Nebula IC 2220 in the Carene - A mass - loss star in IC 2220 - This nebula is illuminated by a giant red star, the star HD 65670. Image obtained by Siding Spring's 3.9m telescope. The bright, supergiant star at the centre of this nebula is known only by its catalog designation, HD 65750. The nebulosity around the star is the result of light reflected by dust surrounding it. The dust is thought to consist mainly of particles of silica condensed from material which the star is losing from its distended surface at a fairly steady rate. The rate of mass loss is much higher than in normal stars and is sufficient to produce the reflection nebula IC 2220. The stellar nature of the central object is revealed by the four diffraction spikes extending from it. These are artifacts due to structures within the telescope. The light from the star has also produced the annular halation ring (a photographic artefact) that ornaments the nebula. These features, real or otherwise, have provoked the name '

Nebula IC 2220 in the Carene - A mass - loss star in IC 2220 - This nebula is illuminated by a giant red star, the star HD 65670. Image obtained by Siding Spring's 3.9m telescope. The bright, supergiant star at the centre of this nebula is known only by its catalog designation, HD 65750. The nebulosity around the star is the result of light reflected by dust surrounding it. The dust is thought to consist mainly of particles of silica condensed from material which the star is losing from its distended surface at a fairly steady rate. The rate of mass loss is much higher than in normal stars and is sufficient to produce the reflection nebula IC 2220. The stellar nature of the central object is revealed by the four diffraction spikes extending from it. These are artifacts due to structures within the telescope. The light from the star has also produced the annular halation ring (a photographic artefact) that ornaments the nebula. These features, real or otherwise, have provoked the name '

PIX4622497

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