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Images of 'Astronomer' found, 3,905

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Jesse Ramsden, English optician and instrument maker, 1791

Jesse Ramsden, English optician and instrument maker, 1791

UIS5087757

Clocks, Chinese & Japanese Astronomical clock, Chinese, 1088

Clocks, Chinese & Japanese Astronomical clock, Chinese, 1088

UIS5086196

Wall hanging, 1858-60 (cotton, brass)

Wall hanging, 1858-60 (cotton, brass)

British School, (19th century)

MMM7340078

'The Great Nebula of Orion', 26 February 1883

'The Great Nebula of Orion', 26 February 1883

UIS5084919

'Successive views of a Sunspot', 1872

'Successive views of a Sunspot', 1872

UIS5084306

Jesse Ramsden, English instrument maker, c 1791

Jesse Ramsden, English instrument maker, c 1791

UIS5076544

Constellation of Sobieski's ECU - Constellation of Scutum - Scutum (The Shield) was originally Scutum Sobiescianum, Sobieski's Shield, and was introduced in 1690 by the astronomer/cartographer Johannes Hevelius, one - time mayor of Gdansk (Danzig), in honour of Polish warrior - King John Sobieski. King John distiguished himself in defending his land against the Turks in 1683, turning them back at the gates of Vienna. For this he was hailed by the Pope and others as the savior of Vienna and Western European Civilization. Scutum was created in honor of this victory, and alpha Scuti named Ioannina (Greek for John) in his honor. Scutum is small, 84th in size out of the 88 modern constellation. It contains no bright stars, and seems to have been carved out of adjoining Aquila and Serpens simply embrace a fine piece of the Milky Way. However, the open clusters M11 and M26 can be found here

Constellation of Sobieski's ECU - Constellation of Scutum - Scutum (The Shield) was originally Scutum Sobiescianum, Sobieski's Shield, and was introduced in 1690 by the astronomer/cartographer Johannes Hevelius, one - time mayor of Gdansk (Danzig), in honour of Polish warrior - King John Sobieski. King John distiguished himself in defending his land against the Turks in 1683, turning them back at the gates of Vienna. For this he was hailed by the Pope and others as the savior of Vienna and Western European Civilization. Scutum was created in honor of this victory, and alpha Scuti named Ioannina (Greek for John) in his honor. Scutum is small, 84th in size out of the 88 modern constellation. It contains no bright stars, and seems to have been carved out of adjoining Aquila and Serpens simply embrace a fine piece of the Milky Way. However, the open clusters M11 and M26 can be found here

PIX4590553

Constellation of Sobieski's ECU - Constellation of Scutum - Scutum (The Shield) was originally Scutum Sobiescianum, Sobieski's Shield, and was introduced in 1690 by the astronomer/cartographer Johannes Hevelius, one - time mayor of Gdansk (Danzig), in honour of Polish warrior - King John Sobieski. King John distiguished himself in defending his land against the Turks in 1683, turning them back at the gates of Vienna. For this he was hailed by the Pope and others as the savior of Vienna and Western European Civilization. Scutum was created in honor of this victory, and alpha Scuti named Ioannina (Greek for John) in his honor. Scutum is small, 84th in size out of the 88 modern constellation. It contains no bright stars, and seems to have been carved out of adjoining Aquila and Serpens simply embrace a fine piece of the Milky Way. However, the open clusters M11 and M26 can be found here

Constellation of Sobieski's ECU - Constellation of Scutum - Scutum (The Shield) was originally Scutum Sobiescianum, Sobieski's Shield, and was introduced in 1690 by the astronomer/cartographer Johannes Hevelius, one - time mayor of Gdansk (Danzig), in honour of Polish warrior - King John Sobieski. King John distiguished himself in defending his land against the Turks in 1683, turning them back at the gates of Vienna. For this he was hailed by the Pope and others as the savior of Vienna and Western European Civilization. Scutum was created in honor of this victory, and alpha Scuti named Ioannina (Greek for John) in his honor. Scutum is small, 84th in size out of the 88 modern constellation. It contains no bright stars, and seems to have been carved out of adjoining Aquila and Serpens simply embrace a fine piece of the Milky Way. However, the open clusters M11 and M26 can be found here

PIX4590556

Star Cluster NGC 1872 in Dorado - Star Cluster NGC 1872 in Dorado - The NGC 1872 cluster is located in the galaxy of the Great Magellan Cloud. It is a cluster of globular shape, but young, composed of warm, blue stars. Image obtained by the Hubble Space Telescope. This Hubble Space Telescope picture shows NGC 1872, a rich cluster of thousands of stars lying in our small neighbouring galaxy, the Large Magellanic Cloud. This little - studied cluster is located in the constellation of Dorado. The Scottish astronomer James Dunlop was probably the first to spot NGC 1872 in 1826 with a small telescope near Sydney in Australia. Star clusters are usually classed as either open or globular but NGC 1872 has characteristics of both - - it is as rich as a typical globular but is much younger, and, like many open clusters, has bluer stars. Such intermediate clusters are common in the Large Magellanic Cloud

Star Cluster NGC 1872 in Dorado - Star Cluster NGC 1872 in Dorado - The NGC 1872 cluster is located in the galaxy of the Great Magellan Cloud. It is a cluster of globular shape, but young, composed of warm, blue stars. Image obtained by the Hubble Space Telescope. This Hubble Space Telescope picture shows NGC 1872, a rich cluster of thousands of stars lying in our small neighbouring galaxy, the Large Magellanic Cloud. This little - studied cluster is located in the constellation of Dorado. The Scottish astronomer James Dunlop was probably the first to spot NGC 1872 in 1826 with a small telescope near Sydney in Australia. Star clusters are usually classed as either open or globular but NGC 1872 has characteristics of both - - it is as rich as a typical globular but is much younger, and, like many open clusters, has bluer stars. Such intermediate clusters are common in the Large Magellanic Cloud

PIX4567854

The Hanger and Nebula SH2 - 83 - Coathanger and nebula SH2 - 83 in Vulpecula - The Hanger cluster or Brocchi cluster (left) is not a true cluster of stars but an asterism located in the constellation of Little Fox. Towards the center of the image, a small nebula emitted, Sh2 - 83. Little Fox Constellation. Brocchi's Cluster (also known as the Coathanger or Collinder 399) is an asterism located in the constellation Vulpecula. It was first described by the Persian astronomer Al Sufi in his Book of Fixed Stars in 964 and was independently rediscovered by Giovanni Hodierna in the seventeenth century. In the 1920s, D. F. Brocchi, an amateur astronomer and chart maker for the American Association of Variable Star Observers, created a map of this object for use in calibrating photometers. The asterism is made up of ten stars ranging from fifth to seventh magnitude which form the conspicuous Coathanger, a straight line of six stars with a “” hook””” of four stars on the south side. An addition

The Hanger and Nebula SH2 - 83 - Coathanger and nebula SH2 - 83 in Vulpecula - The Hanger cluster or Brocchi cluster (left) is not a true cluster of stars but an asterism located in the constellation of Little Fox. Towards the center of the image, a small nebula emitted, Sh2 - 83. Little Fox Constellation. Brocchi's Cluster (also known as the Coathanger or Collinder 399) is an asterism located in the constellation Vulpecula. It was first described by the Persian astronomer Al Sufi in his Book of Fixed Stars in 964 and was independently rediscovered by Giovanni Hodierna in the seventeenth century. In the 1920s, D. F. Brocchi, an amateur astronomer and chart maker for the American Association of Variable Star Observers, created a map of this object for use in calibrating photometers. The asterism is made up of ten stars ranging from fifth to seventh magnitude which form the conspicuous Coathanger, a straight line of six stars with a “” hook””” of four stars on the south side. An addition

Tom Davis

PIX4620989

Around Baade's window - Around Baade's window - Stars field to the center of our galaxy. The bright star at the bottom of the image is Gamma of Sagittarius. The globular cluster in the center of the image is NGC 6522. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. The German - American astronomer Walter Baade selected for study a region of the crowded star fields in Sagittarius where he believed the Galactic dust obscuration was both uniform and minimal. He used this line of sight to establish the distance of the unseen Galactic centre, using variable stars as his yardstick. He found it to be about 30,000 light years away. This part of the sky, around the globular cluster NGC 6522, is now known as Baade's window. The brightest star in the photograph is gamma Sagittarii, a deep yellow, naked eye star of about third magnitude. It is in the foreground at a distance of about 100 light years

Around Baade's window - Around Baade's window - Stars field to the center of our galaxy. The bright star at the bottom of the image is Gamma of Sagittarius. The globular cluster in the center of the image is NGC 6522. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. The German - American astronomer Walter Baade selected for study a region of the crowded star fields in Sagittarius where he believed the Galactic dust obscuration was both uniform and minimal. He used this line of sight to establish the distance of the unseen Galactic centre, using variable stars as his yardstick. He found it to be about 30,000 light years away. This part of the sky, around the globular cluster NGC 6522, is now known as Baade's window. The brightest star in the photograph is gamma Sagittarii, a deep yellow, naked eye star of about third magnitude. It is in the foreground at a distance of about 100 light years

PIX4564878

Dec. 12, 1953 - Giant Bridge seen on the moon. Discovery by astronomer.: Astronomers have spotted a huge bridge on the moon which looks like an engineering job”. Dr. H. Percy Wilkins, Fellow of the Royal Astronomical Society, said on the B.B2 ~'s radio newsreel last night that the bridge is 20 miles long and 5,000 feet high, and snaps a gulf between mountain ranges 6,000 ft. and 10,000 feet high. But there do not appear to be men on the moon after all.” The bridge, is, of course, not man made” - said Dr. Wilkins after the broadcast.” Though the span is 20 miles the arch is probably only two miles across” The explanation?” A mete ~ ~ ite might have crashed through a molten-lava barrier and as the barrier solidified an arch was left” he said

Dec. 12, 1953 - Giant Bridge seen on the moon. Discovery by astronomer.: Astronomers have spotted a huge bridge on the moon which looks like an engineering job”. Dr. H. Percy Wilkins, Fellow of the Royal Astronomical Society, said on the B.B2 ~'s radio newsreel last night that the bridge is 20 miles long and 5,000 feet high, and snaps a gulf between mountain ranges 6,000 ft. and 10,000 feet high. But there do not appear to be men on the moon after all.” The bridge, is, of course, not man made” - said Dr. Wilkins after the broadcast.” Though the span is 20 miles the arch is probably only two miles across” The explanation?” A mete ~ ~ ite might have crashed through a molten-lava barrier and as the barrier solidified an arch was left” he said

ZUM4899945

A representation of the meteor seen at Paddington about 12 minutes before 11 o'clock, on the evening of the 11 February 1850, 1850 (mezzotint)

A representation of the meteor seen at Paddington about 12 minutes before 11 o'clock, on the evening of the 11 February 1850, 1850 (mezzotint)

Wyatt, Matthew Cotes (1777-1862)

MMM7341590

Measuring time

Hardy, Wilf (Wilfred) (20th century)

LAL300748

Constellation of Circinus and southern constellations - Constellation of Circinus and southern constellations - The Southern Triangle constellations, the Fly, and the Southern Cross are also visible. Circinus (the drawing Comppass) is an inconspicuous constellation introduced by the French astronomer Nicolas Louis de Lacaille, who observed the southern sky from the Cape of Good Hope between 1750 and 1754. He named 14 constellations, many of them associated with science or navigation, such as Microscopium and Telescopium, Octans the Octant and Antlia Pneumatica, the air pump. Circinus contains no bright or named stars and covers 93 square degrees, making it the fourth - smallest. Triangulum Australe is the southern hemisphere counterpart of Triangulum. It is a bigger constellation and contains brighter stars than Triangulum and it never sets for most of Australia. Its brightest star is named Atria (for alpha Trianguli Australis), in the manner of Acrux in the Southern Cross. It is easil

Constellation of Circinus and southern constellations - Constellation of Circinus and southern constellations - The Southern Triangle constellations, the Fly, and the Southern Cross are also visible. Circinus (the drawing Comppass) is an inconspicuous constellation introduced by the French astronomer Nicolas Louis de Lacaille, who observed the southern sky from the Cape of Good Hope between 1750 and 1754. He named 14 constellations, many of them associated with science or navigation, such as Microscopium and Telescopium, Octans the Octant and Antlia Pneumatica, the air pump. Circinus contains no bright or named stars and covers 93 square degrees, making it the fourth - smallest. Triangulum Australe is the southern hemisphere counterpart of Triangulum. It is a bigger constellation and contains brighter stars than Triangulum and it never sets for most of Australia. Its brightest star is named Atria (for alpha Trianguli Australis), in the manner of Acrux in the Southern Cross. It is easil

PIX4590052

Constellation of Circinus and southern constellations - Constellation of Circinus and southern constellations - The Southern Triangle constellations, the Fly, and the Southern Cross are also visible. Circinus (the drawing Comppass) is an inconspicuous constellation introduced by the French astronomer Nicolas Louis de Lacaille, who observed the southern sky from the Cape of Good Hope between 1750 and 1754. He named 14 constellations, many of them associated with science or navigation, such as Microscopium and Telescopium, Octans the Octant and Antlia Pneumatica, the air pump. Circinus contains no bright or named stars and covers 93 square degrees, making it the fourth - smallest. Triangulum Australe is the southern hemisphere counterpart of Triangulum. It is a bigger constellation and contains brighter stars than Triangulum and it never sets for most of Australia. Its brightest star is named Atria (for alpha Trianguli Australis), in the manner of Acrux in the Southern Cross. It is easil

Constellation of Circinus and southern constellations - Constellation of Circinus and southern constellations - The Southern Triangle constellations, the Fly, and the Southern Cross are also visible. Circinus (the drawing Comppass) is an inconspicuous constellation introduced by the French astronomer Nicolas Louis de Lacaille, who observed the southern sky from the Cape of Good Hope between 1750 and 1754. He named 14 constellations, many of them associated with science or navigation, such as Microscopium and Telescopium, Octans the Octant and Antlia Pneumatica, the air pump. Circinus contains no bright or named stars and covers 93 square degrees, making it the fourth - smallest. Triangulum Australe is the southern hemisphere counterpart of Triangulum. It is a bigger constellation and contains brighter stars than Triangulum and it never sets for most of Australia. Its brightest star is named Atria (for alpha Trianguli Australis), in the manner of Acrux in the Southern Cross. It is easil

PIX4590041

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

Potash Basins - Utah - June 26, 2017.

Potash Basins - Utah - June 26, 2017.

PIX5940364

Mrs. Bryan and her Children, 1797 (engraving)

Mrs. Bryan and her Children, 1797 (engraving)

Shelley, Samuel (1750-1808)

MMM7340002

Dec. 12, 1953 - Giant Bridge Seen On The Moon. Discovery By Astronomer: Astronomers have spotted a huge bridge on the moon which looks” like an engineering job”. Dr. H. Percy Wilkins, Fellow of the Royal Astronomical Society, said on the B. B2C's radio newsreel last night that the bridge is 20 miles long and 5,000 feet high, and spans a gulf between royal mountain ranges 6,000 ft. and 10,000 feet high. But there do not appear to be men on the moon after all.” The bridge, is, of course, not man made” - said Dr. Wilkins after the broadcast. Though the span is 20 miles the arch is probably only two miles across. The explanation? “A meteorite might have crashed through a molten-lava barrier and as the barrier solidified an arch was left” he said

Dec. 12, 1953 - Giant Bridge Seen On The Moon. Discovery By Astronomer: Astronomers have spotted a huge bridge on the moon which looks” like an engineering job”. Dr. H. Percy Wilkins, Fellow of the Royal Astronomical Society, said on the B. B2C's radio newsreel last night that the bridge is 20 miles long and 5,000 feet high, and spans a gulf between royal mountain ranges 6,000 ft. and 10,000 feet high. But there do not appear to be men on the moon after all.” The bridge, is, of course, not man made” - said Dr. Wilkins after the broadcast. Though the span is 20 miles the arch is probably only two miles across. The explanation? “A meteorite might have crashed through a molten-lava barrier and as the barrier solidified an arch was left” he said

ZUM4901089

James Ferguson, F.R.S., 1776 (mezzotint)

James Ferguson, F.R.S., 1776 (mezzotint)

Haward, Francis (1759-97)

MMM7341596

Nakht 's tomb.- Tree Goddess Nut

Nakht 's tomb.- Tree Goddess Nut

XLF3791543

Captain Sir Thomas Ussher (1779-1848), 1830-33 (oil on canvas)

Captain Sir Thomas Ussher (1779-1848), 1830-33 (oil on canvas)

Morton, Andrew (1802-1845)

MMM7338071

View of Royal Observatory Greenwich at night, taken from Flamsteed House, 2009 (photo)

View of Royal Observatory Greenwich at night, taken from Flamsteed House, 2009 (photo)

MMM7339152

Galaxies Maffei 1 and Maffei 2 in Cassiopee - Maffei Galaxies in Cassiopeia - Maffei 1 (right) is an elliptical galaxy, Maffei 2 (left) is a barree spiral galaxy. These two galaxies are located about 8 million light years away from Earth. Image obtained by the Oschin telescope of Mount Palomar through several filters and composed. The picture show two galaxies lying at 2.5 degrees northeast of h and Chi Persei the famous Double Cluster in Cassiopeia. Although the galaxies has been obstructed by inner galactic matters, their actual sizes are larger than 10 arc minutes, fairly large - sized neighboring galaxies. The Maffei I (on the right) is an elliptic, and the Maffei II (on the left) is classified as a bared galaxy. The galaxies are estimated about 8 million light years away. They were discovered by the Italian astronomer Paolo Maffei in 1968. Now we know about 20 galaxies belonging to Maffei Group. This image is based on data acquired by the Oschin Telescope at the Mount Palomar Obse

Galaxies Maffei 1 and Maffei 2 in Cassiopee - Maffei Galaxies in Cassiopeia - Maffei 1 (right) is an elliptical galaxy, Maffei 2 (left) is a barree spiral galaxy. These two galaxies are located about 8 million light years away from Earth. Image obtained by the Oschin telescope of Mount Palomar through several filters and composed. The picture show two galaxies lying at 2.5 degrees northeast of h and Chi Persei the famous Double Cluster in Cassiopeia. Although the galaxies has been obstructed by inner galactic matters, their actual sizes are larger than 10 arc minutes, fairly large - sized neighboring galaxies. The Maffei I (on the right) is an elliptic, and the Maffei II (on the left) is classified as a bared galaxy. The galaxies are estimated about 8 million light years away. They were discovered by the Italian astronomer Paolo Maffei in 1968. Now we know about 20 galaxies belonging to Maffei Group. This image is based on data acquired by the Oschin Telescope at the Mount Palomar Obse

D. De Martin

PIX4613894

Dark Stars and Nebulae in Sagittarius - The Star Clouds of Sagittarius - Star Field towards the center of our galaxy. The bright star towards the center of the image is Gamma of Sagittarius. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. Orbiting round the centre of our Galaxy are found huge numbers of stars which are mostly faint, cool and often billions of years old. They are as ancient as the Galaxy itself. These stars are seen with the unaided eye as the hazy star clouds of the southern Milky Way, especially rich in Sagittarius. Our line of sight in this direction is strongly affected by dust, which reveals itself by both dimming the starlight passing through it and by selectively removing the blue light, changing the apparent colour to a deeper yellow. Though the colour change is only seen in photographs such as this, the dustiness of the Milky Way is obvious to the unaided eye. Near the centre of the picture is a region known as Baade's Window after the astro

Dark Stars and Nebulae in Sagittarius - The Star Clouds of Sagittarius - Star Field towards the center of our galaxy. The bright star towards the center of the image is Gamma of Sagittarius. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. Orbiting round the centre of our Galaxy are found huge numbers of stars which are mostly faint, cool and often billions of years old. They are as ancient as the Galaxy itself. These stars are seen with the unaided eye as the hazy star clouds of the southern Milky Way, especially rich in Sagittarius. Our line of sight in this direction is strongly affected by dust, which reveals itself by both dimming the starlight passing through it and by selectively removing the blue light, changing the apparent colour to a deeper yellow. Though the colour change is only seen in photographs such as this, the dustiness of the Milky Way is obvious to the unaided eye. Near the centre of the picture is a region known as Baade's Window after the astro

PIX4621371

Globular cluster M13 - Hercules cluster - The Great Globular Cluster in Hercules M13 - M13 (NGC 6205), extends for about 150 years - light and is approximately 25,000 years - light from Earth in the constellation of Hercules. Image of the center of the cluster obtained by the Hubble Space Telescope. This image, taken by the Advanced Camera for Surveys on the Hubble Space Telescope, shows the core of the great globular cluster Messier 13 and provides an extraordinarily clear view of the hundreds of thousands of stars in the cluster, one of the brightest and best known in the sky. Just 25 000 light - years away and about 145 light - years in diameter, Messier 13 has drawn the eye since its discovery by Edmund Halley, the noted British astronomer, in 1714. The cluster lies in the constellation of Hercules and is so bright that under the right conditions it is even visible to the unaided eye. Messier 13 was the target of a symbolic Arecibo radio telescope message that was sent in 1974, com

Globular cluster M13 - Hercules cluster - The Great Globular Cluster in Hercules M13 - M13 (NGC 6205), extends for about 150 years - light and is approximately 25,000 years - light from Earth in the constellation of Hercules. Image of the center of the cluster obtained by the Hubble Space Telescope. This image, taken by the Advanced Camera for Surveys on the Hubble Space Telescope, shows the core of the great globular cluster Messier 13 and provides an extraordinarily clear view of the hundreds of thousands of stars in the cluster, one of the brightest and best known in the sky. Just 25 000 light - years away and about 145 light - years in diameter, Messier 13 has drawn the eye since its discovery by Edmund Halley, the noted British astronomer, in 1714. The cluster lies in the constellation of Hercules and is so bright that under the right conditions it is even visible to the unaided eye. Messier 13 was the target of a symbolic Arecibo radio telescope message that was sent in 1974, com

PIX4564692

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

Hubble Nebula (NGC 2261) in Unicorn - NGC 2261, Hubble's variable nebula - The Hubble Nebula is a weak nebulosite that surrounds the star R Monocerotis (R Mon), the bright star at the bottom of the nebula. The mass of the star R Mon is about 10 times that of the sun. It is approximately 2600 light years away and is only 300,000 years old. Image obtained by Siding Spring's 3.9m telescope. Hubble's variable nebula is in Monoceros and was the first object to be photographed with the famous 200 inch Hale Telescope at Palomar in 1948. This curious object is a reflection nebula in which is embedded the star R Monocerotis. Variations in the appearance of the nebula were noted by the American astronomer Edwin Hubble in 1916. They are probably caused by opaque clouds of dust passing between the hidden star and the outskirts of the nebula we see, the moving shadows changing the apparent form of the glowing dust in an irregular way. This picture was made from three AAT plates taken over several y

Hubble Nebula (NGC 2261) in Unicorn - NGC 2261, Hubble's variable nebula - The Hubble Nebula is a weak nebulosite that surrounds the star R Monocerotis (R Mon), the bright star at the bottom of the nebula. The mass of the star R Mon is about 10 times that of the sun. It is approximately 2600 light years away and is only 300,000 years old. Image obtained by Siding Spring's 3.9m telescope. Hubble's variable nebula is in Monoceros and was the first object to be photographed with the famous 200 inch Hale Telescope at Palomar in 1948. This curious object is a reflection nebula in which is embedded the star R Monocerotis. Variations in the appearance of the nebula were noted by the American astronomer Edwin Hubble in 1916. They are probably caused by opaque clouds of dust passing between the hidden star and the outskirts of the nebula we see, the moving shadows changing the apparent form of the glowing dust in an irregular way. This picture was made from three AAT plates taken over several y

PIX4618577

reproduction of the mural in Nakht 's tomb.- TT52 - grape harvest and bird catching (print)

reproduction of the mural in Nakht 's tomb.- TT52 - grape harvest and bird catching (print)

Unknown Artist, (20th century)

XLF3791559

Airy's transit circle telescope, 1850 (photo)

Airy's transit circle telescope, 1850 (photo)

British School, (19th century)

MMM7340621

Globular cluster M72 in Aquarius - Globular cluster M72 in Aquarius - M72 (NGC 6981) is a cluster of stars located about 50,000 years from Earth. Image obtained by the Hubble Space Telescope. This rich collection of scattered stars, known as Messier 72, is actually a globular cluster, an ancient spherical collection of old stars packed much closer together at its centre. As well as huge numbers of stars in the cluster itself the picture also captures the images of many much more distant galaxies seen between and around the cluster stars. English astronomer Pierre Megchain discovered this rich cluster in August of 1780, but we take Messier 72's most common name from Mechain's colleague Charles Messier, who recorded it as the 72nd entry in his famous catalog of comet - like objects just two months later. This globular cluster lies in the constellation of Aquarius (the Water Bearer) about 50 000 light - years from Earth. This image was taken with the Wide Field Channel of the Advanced Cam

Globular cluster M72 in Aquarius - Globular cluster M72 in Aquarius - M72 (NGC 6981) is a cluster of stars located about 50,000 years from Earth. Image obtained by the Hubble Space Telescope. This rich collection of scattered stars, known as Messier 72, is actually a globular cluster, an ancient spherical collection of old stars packed much closer together at its centre. As well as huge numbers of stars in the cluster itself the picture also captures the images of many much more distant galaxies seen between and around the cluster stars. English astronomer Pierre Megchain discovered this rich cluster in August of 1780, but we take Messier 72's most common name from Mechain's colleague Charles Messier, who recorded it as the 72nd entry in his famous catalog of comet - like objects just two months later. This globular cluster lies in the constellation of Aquarius (the Water Bearer) about 50 000 light - years from Earth. This image was taken with the Wide Field Channel of the Advanced Cam

PIX4565111

Constellations of the Compsole and the Great Dog - Constellations of Pyxis and Canis Major - Constellation of the Compsole, near the horizon, and constellation of the Great Dog with the brilliant star Sirius. Pyxis, the Mariner's Compasse was originally Pyxis Nauticus and refers to the magnetic compasset. It is a small, insignificant arrangement of faint stars surrounded by much more eyecatching patterns of stars. Pyxis was once part of the very large constellation Argo Navis, the ship Argo, which carried Jason and the Argonauts. Argo Navis is now obsolete, but it was listed in Ptolemy's star catalogue, the Almagest. When the constellation boundaries were defined by the International Astronomical Union in the 1930s it was the only one of Ptolemy's 48 constellations that was not accepted. Instead, it was divided into the four constellations introduced by the French cleric and astronomer Nicolas de Lacaille in the 1750s: Carina, the keel, Puppis the stern, Vela the sails, and Pyxis. La C

Constellations of the Compsole and the Great Dog - Constellations of Pyxis and Canis Major - Constellation of the Compsole, near the horizon, and constellation of the Great Dog with the brilliant star Sirius. Pyxis, the Mariner's Compasse was originally Pyxis Nauticus and refers to the magnetic compasset. It is a small, insignificant arrangement of faint stars surrounded by much more eyecatching patterns of stars. Pyxis was once part of the very large constellation Argo Navis, the ship Argo, which carried Jason and the Argonauts. Argo Navis is now obsolete, but it was listed in Ptolemy's star catalogue, the Almagest. When the constellation boundaries were defined by the International Astronomical Union in the 1930s it was the only one of Ptolemy's 48 constellations that was not accepted. Instead, it was divided into the four constellations introduced by the French cleric and astronomer Nicolas de Lacaille in the 1750s: Carina, the keel, Puppis the stern, Vela the sails, and Pyxis. La C

PIX4589254

Constellations of the Compsole and the Great Dog - Constellations of Pyxis and Canis Major - Constellation of the Compsole, near the horizon, and constellation of the Great Dog with the brilliant star Sirius. Pyxis, the Mariner's Compasse was originally Pyxis Nauticus and refers to the magnetic compasset. It is a small, insignificant arrangement of faint stars surrounded by much more eyecatching patterns of stars. Pyxis was once part of the very large constellation Argo Navis, the ship Argo, which carried Jason and the Argonauts. Argo Navis is now obsolete, but it was listed in Ptolemy's star catalogue, the Almagest. When the constellation boundaries were defined by the International Astronomical Union in the 1930s it was the only one of Ptolemy's 48 constellations that was not accepted. Instead, it was divided into the four constellations introduced by the French cleric and astronomer Nicolas de Lacaille in the 1750s: Carina, the keel, Puppis the stern, Vela the sails, and Pyxis. La C

Constellations of the Compsole and the Great Dog - Constellations of Pyxis and Canis Major - Constellation of the Compsole, near the horizon, and constellation of the Great Dog with the brilliant star Sirius. Pyxis, the Mariner's Compasse was originally Pyxis Nauticus and refers to the magnetic compasset. It is a small, insignificant arrangement of faint stars surrounded by much more eyecatching patterns of stars. Pyxis was once part of the very large constellation Argo Navis, the ship Argo, which carried Jason and the Argonauts. Argo Navis is now obsolete, but it was listed in Ptolemy's star catalogue, the Almagest. When the constellation boundaries were defined by the International Astronomical Union in the 1930s it was the only one of Ptolemy's 48 constellations that was not accepted. Instead, it was divided into the four constellations introduced by the French cleric and astronomer Nicolas de Lacaille in the 1750s: Carina, the keel, Puppis the stern, Vela the sails, and Pyxis. La C

PIX4589256

Nebulae IC 2948 and 2944 in Centaur - A large southern emission nebula, IC 2948 - Nebula IC 2948 is a vast nebula located about 6000 years from Earth in the southern constellation of Centaur. It is associated with the cluster of stars IC 2944 near which Bok's blood cells are visible. A Bok's blood cell is a dark interstellar cloud of gases and dust that absorb light. If it condenses enough, it gives birth to new stars. Between the Southern Cross and the rich Carina region, on the southern border of Centaurus, is a large, almost featureless emission nebula, IC 2948, with a sprinkling of bright stars, Collinder 249. It is against this uniform, backdrop that we see a brighter region (IC 2944) which hosts small group of dark clouds of the kind known as 'Bok globules'. They are named for the Dutch - American astronomer who first drew attention to them as the possible sites of star formation. There are young stars scattered through the nebula and these stars are responsible for its existence

Nebulae IC 2948 and 2944 in Centaur - A large southern emission nebula, IC 2948 - Nebula IC 2948 is a vast nebula located about 6000 years from Earth in the southern constellation of Centaur. It is associated with the cluster of stars IC 2944 near which Bok's blood cells are visible. A Bok's blood cell is a dark interstellar cloud of gases and dust that absorb light. If it condenses enough, it gives birth to new stars. Between the Southern Cross and the rich Carina region, on the southern border of Centaurus, is a large, almost featureless emission nebula, IC 2948, with a sprinkling of bright stars, Collinder 249. It is against this uniform, backdrop that we see a brighter region (IC 2944) which hosts small group of dark clouds of the kind known as 'Bok globules'. They are named for the Dutch - American astronomer who first drew attention to them as the possible sites of star formation. There are young stars scattered through the nebula and these stars are responsible for its existence

PIX4622607

The Southern Milky Way and south celestial pole - The Southern Milky Way and south celestial pole - The Octant constellation houses the south celeste pole (mark of a cross) This part of the sky was mostly uncharted by Europeans until the 17th and 18th centuries, so many of the constellations in the southern (lower) half of the image are relatively modern constructions without mythlogical connotations. Octans, the Octant (a forerunner of the sextant) is an Enlightenment - period instrument whose outline was constructed on the sky by the vivid imagination of the Abbe Lacaille. The constellation is quite large but totally undistinguished. Its only notable feature is the South Celestial Pole, with is marked (within a degree or so) by the faint star s Octantis. Apus, the Bird of Paradise, first appeared in the star charts of the German astronomer Johann Bayer in 1603. It contains no named stars. Chameleon, a type of lizard. The stars here are even fainter than those in Apus. Mensa, the cons

The Southern Milky Way and south celestial pole - The Southern Milky Way and south celestial pole - The Octant constellation houses the south celeste pole (mark of a cross) This part of the sky was mostly uncharted by Europeans until the 17th and 18th centuries, so many of the constellations in the southern (lower) half of the image are relatively modern constructions without mythlogical connotations. Octans, the Octant (a forerunner of the sextant) is an Enlightenment - period instrument whose outline was constructed on the sky by the vivid imagination of the Abbe Lacaille. The constellation is quite large but totally undistinguished. Its only notable feature is the South Celestial Pole, with is marked (within a degree or so) by the faint star s Octantis. Apus, the Bird of Paradise, first appeared in the star charts of the German astronomer Johann Bayer in 1603. It contains no named stars. Chameleon, a type of lizard. The stars here are even fainter than those in Apus. Mensa, the cons

PIX4594601

Uranus - Illustration - The planet Uranus and its system of rings. This image suggests how Uranus might look from a position in space several hundred thousand miles above its south pole. Like Saturn and Jupiter, Uranus is a Gas Giant, composed primarily of hydrogen and helium gases surrounding a relatively small, dense core of molten rock and metal. Its bluish color is due to the presence of methane in its upper atmosphere. Also like Saturn and Jupiter, Uranus has rings. However Uranus' rings are over three orders of magnitude dimmer than Saturn's; where Saturn's rings are almost white, Uranus' rings are more like the color of charcoal. Uranus 'rings are so dim that they went undetected from 1781, when the English astronomer William Herschel first observed Uranus through a telescope, until 1977 when astronomers watched as a star passing behind Uranus appeared to blink several times, caused by the ten rings surrounding the planet. One bizarre aspect of Uranus is that its axis of rotatio

Uranus - Illustration - The planet Uranus and its system of rings. This image suggests how Uranus might look from a position in space several hundred thousand miles above its south pole. Like Saturn and Jupiter, Uranus is a Gas Giant, composed primarily of hydrogen and helium gases surrounding a relatively small, dense core of molten rock and metal. Its bluish color is due to the presence of methane in its upper atmosphere. Also like Saturn and Jupiter, Uranus has rings. However Uranus' rings are over three orders of magnitude dimmer than Saturn's; where Saturn's rings are almost white, Uranus' rings are more like the color of charcoal. Uranus 'rings are so dim that they went undetected from 1781, when the English astronomer William Herschel first observed Uranus through a telescope, until 1977 when astronomers watched as a star passing behind Uranus appeared to blink several times, caused by the ten rings surrounding the planet. One bizarre aspect of Uranus is that its axis of rotatio

Walter B Myers

PIX4634800

Galaxies Group: Stephan's Quintet in Pegase - Stephan's Quintet group of galaxies - Image obtained with the Hubble space telescope. This group of 5 galaxies is located about 270 million light years away from Earth. In this image three star-forming regions are visible: in the long arm of NGC 7319 (near the center); the gas debris of two galaxies, NGC 7318B and NGC 7318A (upper right); and in the upper left. Blue indicates that these stars are young. This NASA/ESA Hubble Space Telescope image is a close - up view of the central part of Stephan's Quintet, giving a magnificent view of a gigantic cosmic collision. Stephan's Quintet, as its name implies, is a group of five galaxies (NGC7317, 7318A, 7318B, 7319 and 7320) and lies about 270 million light - years away in the constellation of Pegasus (North - west of the Great Square of Pegasus). A sixth galaxy (NGC 7320C) lies south - east of the other five (upper left - hand corner of the overview image). The galaxy group was the first of its

Galaxies Group: Stephan's Quintet in Pegase - Stephan's Quintet group of galaxies - Image obtained with the Hubble space telescope. This group of 5 galaxies is located about 270 million light years away from Earth. In this image three star-forming regions are visible: in the long arm of NGC 7319 (near the center); the gas debris of two galaxies, NGC 7318B and NGC 7318A (upper right); and in the upper left. Blue indicates that these stars are young. This NASA/ESA Hubble Space Telescope image is a close - up view of the central part of Stephan's Quintet, giving a magnificent view of a gigantic cosmic collision. Stephan's Quintet, as its name implies, is a group of five galaxies (NGC7317, 7318A, 7318B, 7319 and 7320) and lies about 270 million light - years away in the constellation of Pegasus (North - west of the Great Square of Pegasus). A sixth galaxy (NGC 7320C) lies south - east of the other five (upper left - hand corner of the overview image). The galaxy group was the first of its

PIX4565462

The Southern Milky Way and south celestial pole - The Octant constellation houses the southern Celestial pole. See annotee image a - cst98 - 00005 to identify the different constellations present in the image. This part of the sky was mostly uncharted by Europeans until the 17th and 18th centuries, so many of the constellations in the southern (lower) half of the image are relatively modern constructions without mythlogical connotations. Octans, the Octant (a forerunner of the sextant) is an Enlightenment - period instrument whose outline was constructed on the sky by the vivid imagination of the Abbe Lacaille. The constellation is quite large but totally undistinguished. Its only notable feature is the South Celestial Pole, with is marked (within a degree or so) by the faint star s Octantis. Apus, the Bird of Paradise, first appeared in the star charts of the German astronomer Johann Bayer in 1603. It contains no named stars. Chameleon, a type of lizard. The stars here are even fainte

The Southern Milky Way and south celestial pole - The Octant constellation houses the southern Celestial pole. See annotee image a - cst98 - 00005 to identify the different constellations present in the image. This part of the sky was mostly uncharted by Europeans until the 17th and 18th centuries, so many of the constellations in the southern (lower) half of the image are relatively modern constructions without mythlogical connotations. Octans, the Octant (a forerunner of the sextant) is an Enlightenment - period instrument whose outline was constructed on the sky by the vivid imagination of the Abbe Lacaille. The constellation is quite large but totally undistinguished. Its only notable feature is the South Celestial Pole, with is marked (within a degree or so) by the faint star s Octantis. Apus, the Bird of Paradise, first appeared in the star charts of the German astronomer Johann Bayer in 1603. It contains no named stars. Chameleon, a type of lizard. The stars here are even fainte

PIX4594597

Globular cluster NGC 1806 in Dorado - Globular cluster NGC 1806 in Dorado - Image of the globular cluster NGC 1806 located in the southern constellation of Dorado. NGC 1806 belongs to the galaxy of the Great Magellan Cloud, a galaxy adjacent to our lactee path. Image obtained by the Hubble Space Telescope (HST). The NASA/ESA Hubble Space Telescope has turned its sharp eye towards a tight collection of stars, first seen 174 years ago. The result is a sparkling image of NGC 1806, tens of thousands of stars gravitationally bound into a rich cluster. Commonly called globular clusters, most of these objects are very old, having formed in the distant past when the Universe was only a fraction of its current age. NGC 1806 lies within the Large Magellanic Cloud, a satellite galaxy of our own Milky Way. It can be observed within the constellation of Dorado (the dolphin - fish), an area of the sky best seen from the Earth's southern hemisphere. NGC 1806 was discovered in 1836 by the British astr

Globular cluster NGC 1806 in Dorado - Globular cluster NGC 1806 in Dorado - Image of the globular cluster NGC 1806 located in the southern constellation of Dorado. NGC 1806 belongs to the galaxy of the Great Magellan Cloud, a galaxy adjacent to our lactee path. Image obtained by the Hubble Space Telescope (HST). The NASA/ESA Hubble Space Telescope has turned its sharp eye towards a tight collection of stars, first seen 174 years ago. The result is a sparkling image of NGC 1806, tens of thousands of stars gravitationally bound into a rich cluster. Commonly called globular clusters, most of these objects are very old, having formed in the distant past when the Universe was only a fraction of its current age. NGC 1806 lies within the Large Magellanic Cloud, a satellite galaxy of our own Milky Way. It can be observed within the constellation of Dorado (the dolphin - fish), an area of the sky best seen from the Earth's southern hemisphere. NGC 1806 was discovered in 1836 by the British astr

PIX4564335

Barree spiral galaxy NGC 4394 in Berenice's Hair - Barred spiral galaxy NGC 4394 in Coma Berenices: NGC 4394 is a barree spiral galaxy located in the Virgin's cluster about 55 million light years from Earth. Image obtained by the Hubble Space Telescope (HST) - Discovered in 1784 by the German-British astronomer William Herschel, NGC 4394 is a barred spiral galaxy situated about 55 million light-years from Earth. The galaxy lies in the constellation of Coma Berenices (Berenice's Hair), and is considered to be a member of the Virgo Cluster. NGC 4394 is the archetypal barred spiral galaxy, with bright spiral arms emerging from the ends of a bar that cuts through the galaxy's central bulge. These arms are peppered with young blue stars, dark filaments of cosmic dust, and bright, fuzzy regions of active star formation. At the centre of NGC 4394 lies a region of ionised gas known as a LINER. Liners are active regions that display a characteristic set of emission lines in their spectra- mostl

Barree spiral galaxy NGC 4394 in Berenice's Hair - Barred spiral galaxy NGC 4394 in Coma Berenices: NGC 4394 is a barree spiral galaxy located in the Virgin's cluster about 55 million light years from Earth. Image obtained by the Hubble Space Telescope (HST) - Discovered in 1784 by the German-British astronomer William Herschel, NGC 4394 is a barred spiral galaxy situated about 55 million light-years from Earth. The galaxy lies in the constellation of Coma Berenices (Berenice's Hair), and is considered to be a member of the Virgo Cluster. NGC 4394 is the archetypal barred spiral galaxy, with bright spiral arms emerging from the ends of a bar that cuts through the galaxy's central bulge. These arms are peppered with young blue stars, dark filaments of cosmic dust, and bright, fuzzy regions of active star formation. At the centre of NGC 4394 lies a region of ionised gas known as a LINER. Liners are active regions that display a characteristic set of emission lines in their spectra- mostl

PIX4611351

Interacting galaxies in the Austral Fish - Interacting galaxies in Piscis Austrinus - The galaxies NGC 7173 (middle left), NGC 7174 (middle right) and NGC 7176 (bottom right) photographed here by the Hubble Space Telescope (HST), belong to a cluster of galaxies called Hickson Compact Group 90 (HCG 90), located about 100 million years ago lights in the constellation of Southern Fish. NGC 7173 and NGC 7176 are two elliptical galaxies while NGC 7174 is a spiral galaxy deformed by the gravitational forces exerted by its neighbors. The three pictured galaxies - - NGC 7173 (middle left), NCG 7174 (middle right) and NGC 7176 (lower right) - - are part of the Hickson Compact Group 90, named after astronomer Paul Hickson, who first catalogued these small clusters of galaxies in the 1980s. NGC 7173 and NGC 7176 appear to be smooth, normal elliptical galaxies without much gas and dust. In stark contrast, NGC 7174 is a mangled spiral galaxy, barely clinging to independent existence as it is ripped

Interacting galaxies in the Austral Fish - Interacting galaxies in Piscis Austrinus - The galaxies NGC 7173 (middle left), NGC 7174 (middle right) and NGC 7176 (bottom right) photographed here by the Hubble Space Telescope (HST), belong to a cluster of galaxies called Hickson Compact Group 90 (HCG 90), located about 100 million years ago lights in the constellation of Southern Fish. NGC 7173 and NGC 7176 are two elliptical galaxies while NGC 7174 is a spiral galaxy deformed by the gravitational forces exerted by its neighbors. The three pictured galaxies - - NGC 7173 (middle left), NCG 7174 (middle right) and NGC 7176 (lower right) - - are part of the Hickson Compact Group 90, named after astronomer Paul Hickson, who first catalogued these small clusters of galaxies in the 1980s. NGC 7173 and NGC 7176 appear to be smooth, normal elliptical galaxies without much gas and dust. In stark contrast, NGC 7174 is a mangled spiral galaxy, barely clinging to independent existence as it is ripped

PIX4613098

Nebula IC 2948 in Centaurus - Nebula IC 2948 and IC 2944 in Centaurus - Nebula IC 2948 is a vast nebula located about 6000 years from Earth in the southern constellation of Centaurus. It is associated with the cluster of stars IC 2944 near which Bok's blood cells are visible. A Bok's blood cell is a dark interstellar cloud of gases and dust that absorb light. If it condenses enough, it gives birth to new stars. Image obtained through 3 different filters that highlight oxygen (blue), hydrogen (green), and sulfur (red). Between the Southern Cross and the rich Carina region, on the southern border of Centaurus, is a large, almost featureless emission nebula, IC 2948, with a sprinkling of bright stars, Collinder 249. It is against this uniform, backdrop that we see a brighter region (IC 2944) which hosts small group of dark clouds of the kind known as 'Bok globules'. They are named for the Dutch - American astronomer who first drew attention to them as the possible sites of star formation.

Nebula IC 2948 in Centaurus - Nebula IC 2948 and IC 2944 in Centaurus - Nebula IC 2948 is a vast nebula located about 6000 years from Earth in the southern constellation of Centaurus. It is associated with the cluster of stars IC 2944 near which Bok's blood cells are visible. A Bok's blood cell is a dark interstellar cloud of gases and dust that absorb light. If it condenses enough, it gives birth to new stars. Image obtained through 3 different filters that highlight oxygen (blue), hydrogen (green), and sulfur (red). Between the Southern Cross and the rich Carina region, on the southern border of Centaurus, is a large, almost featureless emission nebula, IC 2948, with a sprinkling of bright stars, Collinder 249. It is against this uniform, backdrop that we see a brighter region (IC 2944) which hosts small group of dark clouds of the kind known as 'Bok globules'. They are named for the Dutch - American astronomer who first drew attention to them as the possible sites of star formation.

Tom Davis

PIX4622599

Size comparison: Earth, Moon and Galilean satellites - Jupiter's four largest satellites and Earth and the Moon compared - Jupiter's four largest satellites, called Galilean satellites, compared to Earth and Moon. At the top, from left to right, in order of their distance to the planet Jupiter, we find Io, Europe, Ganymede and Callisto. Ganymede is the largest satellite in the solar system. Jupiter's four largest satellites, also known as the “” Galilean”” satellites since they were first observed by the Italian astronomer Galileo over 400 years ago, are worlds in their own right. Top row, left to right, in order from their distances from Jupiter, are: Io, Europa, Ganymede, Callisto Io is the most volcanic world in the Solar System, resurfacing itself continually with extremely hot and massive eruptions that spew material over 200 miles into space. Europa is about the same size as Earth's Moon, however unlike the Moon which is made up mostly of dry silicate materials, Europa is believe

Size comparison: Earth, Moon and Galilean satellites - Jupiter's four largest satellites and Earth and the Moon compared - Jupiter's four largest satellites, called Galilean satellites, compared to Earth and Moon. At the top, from left to right, in order of their distance to the planet Jupiter, we find Io, Europe, Ganymede and Callisto. Ganymede is the largest satellite in the solar system. Jupiter's four largest satellites, also known as the “” Galilean”” satellites since they were first observed by the Italian astronomer Galileo over 400 years ago, are worlds in their own right. Top row, left to right, in order from their distances from Jupiter, are: Io, Europa, Ganymede, Callisto Io is the most volcanic world in the Solar System, resurfacing itself continually with extremely hot and massive eruptions that spew material over 200 miles into space. Europa is about the same size as Earth's Moon, however unlike the Moon which is made up mostly of dry silicate materials, Europa is believe

Walter B Myers

PIX4629924

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

Spiral galaxy NGC 2683 in Lynx - Spiral galaxy NGC 2683 in Lynx - Spiral galaxy NGC 2683 distant about 16 million years - light in the constellation Lynx. Image obtained by the Hubble Space Telescope (HST). NGC 2683 is a spiral galaxy seen almost edge - on, giving it the shape of a classic science fiction spaceship. The delicate dusty lanes of the spiral arms are silhouetted against the golden haze of the galaxy's core. In addition, brilliant clusters of young blue stars shine scattered throughout the disc, mapping the galaxy's star - forming regions. Perhaps surprisingly, side - on views of galaxies like this one do not prevent astronomers from deducing their structures. Studies of the properties of the light coming from NGC 2683 suggest that this is a barred spiral galaxy, even though the angle we see it at does not let us see this directly. NGC 2683, discovered on 5 February 1788 by the famous astronomer William Herschel, lies in the Northern constellation of Lynx. A constellation n

Spiral galaxy NGC 2683 in Lynx - Spiral galaxy NGC 2683 in Lynx - Spiral galaxy NGC 2683 distant about 16 million years - light in the constellation Lynx. Image obtained by the Hubble Space Telescope (HST). NGC 2683 is a spiral galaxy seen almost edge - on, giving it the shape of a classic science fiction spaceship. The delicate dusty lanes of the spiral arms are silhouetted against the golden haze of the galaxy's core. In addition, brilliant clusters of young blue stars shine scattered throughout the disc, mapping the galaxy's star - forming regions. Perhaps surprisingly, side - on views of galaxies like this one do not prevent astronomers from deducing their structures. Studies of the properties of the light coming from NGC 2683 suggest that this is a barred spiral galaxy, even though the angle we see it at does not let us see this directly. NGC 2683, discovered on 5 February 1788 by the famous astronomer William Herschel, lies in the Northern constellation of Lynx. A constellation n

PIX4610165

Remnants of Supernova Tycho in X in Cassiopee - Tycho's Supernova Remnant: Chandra's View of Tycho's Supernova Remnant This Chandra image reveals fascinating details of the turbulent debris created by a supernova explosion that was observed by the Danish astronomer Tycho Brahe in the year 1572. The colors show different X - ray energies, with red, green, and blue representing low, medium and high energies, respectively. The image is cut off at the bottom because the southernmost region of the remnant fell outside the field of view of the detector. A shock wave produced by the expanding debris is outlined by the strikingly sharp blue circular arcs of twenty million degree Celsius gas seen on the outer rim. The stellar debris, which has a temperature of about ten million degrees and is visible only in X - rays, shows up as mottled yellow, green and red fingers of gas. Tycho's supernova remnant presents several interesting contrasts with the Cassiopeia A (Cas A) supernova remnant. The deb

Remnants of Supernova Tycho in X in Cassiopee - Tycho's Supernova Remnant: Chandra's View of Tycho's Supernova Remnant This Chandra image reveals fascinating details of the turbulent debris created by a supernova explosion that was observed by the Danish astronomer Tycho Brahe in the year 1572. The colors show different X - ray energies, with red, green, and blue representing low, medium and high energies, respectively. The image is cut off at the bottom because the southernmost region of the remnant fell outside the field of view of the detector. A shock wave produced by the expanding debris is outlined by the strikingly sharp blue circular arcs of twenty million degree Celsius gas seen on the outer rim. The stellar debris, which has a temperature of about ten million degrees and is visible only in X - rays, shows up as mottled yellow, green and red fingers of gas. Tycho's supernova remnant presents several interesting contrasts with the Cassiopeia A (Cas A) supernova remnant. The deb

PIX4582513

Remnants of the Crab Supernova (M1) in the Taurus - This is a mosaic image, one of the largest ever taken by Nasa's Hubble Space Telescope of the Crab Nebula, a six - light - year - wide expanding remnant of a star's supernova explosion. Japanese and Chinese astronomers recorded this violent event nearly 1,000 years ago in 1054, as did, almost certainly, Native Americans. The orange filaments are the tattered remains of the star and consist mostly of hydrogen. The rapidly spinning neutron star embedded in the center of the nebula is the dynamo powering the nebula's eerie interior bluish glow. The blue light comes from electrons whirling at nearly the speed of light around magnetic field lines from the neutron star. The neutron star, like a lighthouse, ejects twin beams of radiation that appear to pulse 30 times a second due to the neutron star's rotation. A neutron star is the crushed ultra - dense core of the exploded star. The Crab Nebula derived its name from its appearance in a dra

Remnants of the Crab Supernova (M1) in the Taurus - This is a mosaic image, one of the largest ever taken by Nasa's Hubble Space Telescope of the Crab Nebula, a six - light - year - wide expanding remnant of a star's supernova explosion. Japanese and Chinese astronomers recorded this violent event nearly 1,000 years ago in 1054, as did, almost certainly, Native Americans. The orange filaments are the tattered remains of the star and consist mostly of hydrogen. The rapidly spinning neutron star embedded in the center of the nebula is the dynamo powering the nebula's eerie interior bluish glow. The blue light comes from electrons whirling at nearly the speed of light around magnetic field lines from the neutron star. The neutron star, like a lighthouse, ejects twin beams of radiation that appear to pulse 30 times a second due to the neutron star's rotation. A neutron star is the crushed ultra - dense core of the exploded star. The Crab Nebula derived its name from its appearance in a dra

PIX4583010

Warszawa 1946 r. Pomnik Mikolaja Kopernika.

Warszawa 1946 r. Pomnik Mikolaja Kopernika.

Edward Falkowski

FRM5627518

Nebula IC 2948 in Centaurus - Nebula IC 2948 and IC 2944 in Centaurus: IC2944 - SHO 70 70 70 Bin 2 - Nebula IC 2948 is a vast nebula located about 6000 light years from Earth in the southern constellation of Centaurus. It is associated with the cluster of stars IC 2944 near which Bok's blood cells are visible. A Bok's blood cell is a dark interstellar cloud of gases and dust that absorb light. If it condenses enough, it gives birth to new stars - Image obtained through 3 different filters that highlight oxygen (in blue), hydrogen (in green), and sulfur (in red) - Between the Southern Cross and the rich Carina region, on the southern border of Centaurus, is a large, almost featureless emission nebula, IC 2948, with a sprinkling of bright stars, Collinder 249. It is against this uniform, backdrop that we see a brighter region (IC 2944) which hosts small group of dark clouds of the kind known as 'Bok globules'. They are named for the Dutch-American astronomer who first drew attention to t

Nebula IC 2948 in Centaurus - Nebula IC 2948 and IC 2944 in Centaurus: IC2944 - SHO 70 70 70 Bin 2 - Nebula IC 2948 is a vast nebula located about 6000 light years from Earth in the southern constellation of Centaurus. It is associated with the cluster of stars IC 2944 near which Bok's blood cells are visible. A Bok's blood cell is a dark interstellar cloud of gases and dust that absorb light. If it condenses enough, it gives birth to new stars - Image obtained through 3 different filters that highlight oxygen (in blue), hydrogen (in green), and sulfur (in red) - Between the Southern Cross and the rich Carina region, on the southern border of Centaurus, is a large, almost featureless emission nebula, IC 2948, with a sprinkling of bright stars, Collinder 249. It is against this uniform, backdrop that we see a brighter region (IC 2944) which hosts small group of dark clouds of the kind known as 'Bok globules'. They are named for the Dutch-American astronomer who first drew attention to t

W. Promper

PIX4622580

Barree spiral galaxy NGC 1559 and supernova - Barred spiral galaxy NGC 1559 with a supernova - The galaxy NGC 1559 is a galaxy of Seyfert located about 50 million years ago - light in the constellation Reticule. In this image obtained in 2005 by the Kueyen European telescope of the VLT in Chile, a bright star is visible just above the galaxy, a supernova of type Ia named SN 2005df. On the night of August 4, 2005, an amateur astronomer and supernovae discoverer Reverend Robert Evans discovered a supernova just North of this galaxy. This supernova is classified as a somewhat unusual type Ia supernova, caught probably 10 days before it reached its maximum brightness. Such a supernova is thought to be the result of the explosion of a small and dense star - a white dwarf - inside a binary system. As its companion was continuously spilling matter onto the white dwarf, the white dwarf reached a critical mass, leading to a fatal instability. NGC 1559 is a SBc (s) - type spiral galaxy located a

Barree spiral galaxy NGC 1559 and supernova - Barred spiral galaxy NGC 1559 with a supernova - The galaxy NGC 1559 is a galaxy of Seyfert located about 50 million years ago - light in the constellation Reticule. In this image obtained in 2005 by the Kueyen European telescope of the VLT in Chile, a bright star is visible just above the galaxy, a supernova of type Ia named SN 2005df. On the night of August 4, 2005, an amateur astronomer and supernovae discoverer Reverend Robert Evans discovered a supernova just North of this galaxy. This supernova is classified as a somewhat unusual type Ia supernova, caught probably 10 days before it reached its maximum brightness. Such a supernova is thought to be the result of the explosion of a small and dense star - a white dwarf - inside a binary system. As its companion was continuously spilling matter onto the white dwarf, the white dwarf reached a critical mass, leading to a fatal instability. NGC 1559 is a SBc (s) - type spiral galaxy located a

PIX4609916

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

Barree spiral galaxy NGC 2146 in the Giraffe - Barred spiral galaxy NGC 2146 in Camelopardalis - NGC 2146 is a barree spiral galaxy located about 70 million years ago - light from Earth in the constellation Giraffe (Camelopardalis). Image obtained by the Hubble Space Telescope (HST). NGC 2146 is classified as a barred spiral due to its shape, but the most distinctive feature is the dusty spiral arm that has looped in front of the galaxy's core as seen from our perspective. The forces required to pull this structure out of its natural shape and twist it up to 45 degrees are colossal. The most likely explanation is that a neighbouring galaxy is gravitationally perturbing it and distorting the orbits of many of NGC 2146's stars. It is probable that we are currently witnessing the end stages of a process which has been occurring for tens of millions of years. NCG 2146 is undergoing intense bouts of star formation, to such an extent that it is referred to as a starburst galaxy. This is a co

Barree spiral galaxy NGC 2146 in the Giraffe - Barred spiral galaxy NGC 2146 in Camelopardalis - NGC 2146 is a barree spiral galaxy located about 70 million years ago - light from Earth in the constellation Giraffe (Camelopardalis). Image obtained by the Hubble Space Telescope (HST). NGC 2146 is classified as a barred spiral due to its shape, but the most distinctive feature is the dusty spiral arm that has looped in front of the galaxy's core as seen from our perspective. The forces required to pull this structure out of its natural shape and twist it up to 45 degrees are colossal. The most likely explanation is that a neighbouring galaxy is gravitationally perturbing it and distorting the orbits of many of NGC 2146's stars. It is probable that we are currently witnessing the end stages of a process which has been occurring for tens of millions of years. NCG 2146 is undergoing intense bouts of star formation, to such an extent that it is referred to as a starburst galaxy. This is a co

PIX4609999

Remains of the supernova Kepler in Ophiuchus - Nasa's three Great Observatories - - the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X - ray Observatory - joined forces to probe the expanding remains of a supernova, called Kepler's supernova remnant, first seen 400 years ago by sky watchers, including famous astronomer Johannes Kepler. The combined image unveils a bubble - shaped shroud of gas and dust that is 14 light - years wide and is expanding at 4 million miles per hour (2,000 kilometers per second). Observations from each telescope highlight distinct features of the supernova remnant, a fast - moving shell of iron - rich material from the exploded star, surrounded by an expanding shock wave that is sweeping up interstellar gas and dust. Each color in this image represents a different region of the electromagnetic spectrum, from X - rays to infrared light. The X - ray and infrared data cannot be seen with the human eye. By color - coding those data and com

Remains of the supernova Kepler in Ophiuchus - Nasa's three Great Observatories - - the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X - ray Observatory - joined forces to probe the expanding remains of a supernova, called Kepler's supernova remnant, first seen 400 years ago by sky watchers, including famous astronomer Johannes Kepler. The combined image unveils a bubble - shaped shroud of gas and dust that is 14 light - years wide and is expanding at 4 million miles per hour (2,000 kilometers per second). Observations from each telescope highlight distinct features of the supernova remnant, a fast - moving shell of iron - rich material from the exploded star, surrounded by an expanding shock wave that is sweeping up interstellar gas and dust. Each color in this image represents a different region of the electromagnetic spectrum, from X - rays to infrared light. The X - ray and infrared data cannot be seen with the human eye. By color - coding those data and com

PIX4582960

Open cluster Westerlund 2 in Carene - Open cluster Westerlund 2 in Carina - The open cluster Westerlund 2 is located about 20,000 years - light in the southern constellation of Carene, within the nebula Gum 29. About 3000 stars form this cluster. It contains a significant number of massive stars including one of the most massive stars known to date: WR 20a. Image obtained by the Hubble Space Telescope. The sparkling centerpiece of this image taken by the Hubble space telescope is a giant cluster of about 3,000 stars called Westerlund 2, named for Swedish astronomer Bengt Westerlund, who discovered the grouping in the 1960s. The cluster resides in a raucous stellar breeding ground known as Gum 29, located 20,000 light - years away from Earth in the constellation Carina. To capture this image, Hubble's near - infrared Wide Field Camera 3 near - infrared pierced through the dusty veil shrouding the stellar nursery, giving astronomers a clear view of the nebula and the dense concentration

Open cluster Westerlund 2 in Carene - Open cluster Westerlund 2 in Carina - The open cluster Westerlund 2 is located about 20,000 years - light in the southern constellation of Carene, within the nebula Gum 29. About 3000 stars form this cluster. It contains a significant number of massive stars including one of the most massive stars known to date: WR 20a. Image obtained by the Hubble Space Telescope. The sparkling centerpiece of this image taken by the Hubble space telescope is a giant cluster of about 3,000 stars called Westerlund 2, named for Swedish astronomer Bengt Westerlund, who discovered the grouping in the 1960s. The cluster resides in a raucous stellar breeding ground known as Gum 29, located 20,000 light - years away from Earth in the constellation Carina. To capture this image, Hubble's near - infrared Wide Field Camera 3 near - infrared pierced through the dusty veil shrouding the stellar nursery, giving astronomers a clear view of the nebula and the dense concentration

PIX4569094

Photographing Venus Occultation in 2007

Photographing Venus Occultation in 2007

PIX5619636

A couple enjoying the night sky

A couple enjoying the night sky

S. Numazawa

PIX5619629

Spiral galaxy NGC 6503 in the Dragon - Spiral galaxy NGC 6503 in Draco - The dwarf spiral galaxy NGC 6503 is located about 17 million years ago - light from Earth. It spans 30,000 light years and shows many star-forming regions. Image obtained by the Hubble Space Telescope. Fresh starbirth infuses the galaxy NGC 6503 with a vital pink glow in this image from the NASA/ESA Hubble Space Telescope. This galaxy, a smaller version of the Milky Way, is perched near a great void in space where few other galaxies reside. This new image from Hubble's Advanced Camera for Surveys displays, with particular clarity, the pink - colored puffs marking where stars have recently formed in NGC 6503's swirling spiral arms. Although structurally similar to the Milky Way, the disc of NGC 6503 spans just 30 000 light - years, or just about a third of the size of the Milky Way, leading astronomers to classify NGC 6503 as a dwarf spiral galaxy. NGC 6503 lies approximately 17 million light - years away in the co

Spiral galaxy NGC 6503 in the Dragon - Spiral galaxy NGC 6503 in Draco - The dwarf spiral galaxy NGC 6503 is located about 17 million years ago - light from Earth. It spans 30,000 light years and shows many star-forming regions. Image obtained by the Hubble Space Telescope. Fresh starbirth infuses the galaxy NGC 6503 with a vital pink glow in this image from the NASA/ESA Hubble Space Telescope. This galaxy, a smaller version of the Milky Way, is perched near a great void in space where few other galaxies reside. This new image from Hubble's Advanced Camera for Surveys displays, with particular clarity, the pink - colored puffs marking where stars have recently formed in NGC 6503's swirling spiral arms. Although structurally similar to the Milky Way, the disc of NGC 6503 spans just 30 000 light - years, or just about a third of the size of the Milky Way, leading astronomers to classify NGC 6503 as a dwarf spiral galaxy. NGC 6503 lies approximately 17 million light - years away in the co

PIX4612940

Star formation in the Sails - Star formation in Vela - Infrared view of the nebulae Gum 22 (top right), Gum 23, IRAS 09002 - 4732 (orange cloud near center), Bran 226 (bottom left), and Gum 25 (bottom left). These star-forming regions are located between 4000 and 10,000 light years of the Earth. The bright green star, down to the right of the image, is a carbon star, IRAS 08535 - 4724. Image obtained by the WISE telescope (Wide - field Infrared Explorer). This image from Nasa's Wide - field Infrared Survey Explorer, or WISE, highlights several star - forming regions. There are five distinct centers of star birth in this one image alone. Star - forming nebulae (called HII regions by astronomers) are clouds of gas and dust that have been heated up by nearby stars recently formed from the same cloud. The largest, brightest cloud, in the upper right is known as Gum 22. It's named after Colin Gum, an Australian astronomer who surveyed the southern hemisphere sky in the early 1950's looking

Star formation in the Sails - Star formation in Vela - Infrared view of the nebulae Gum 22 (top right), Gum 23, IRAS 09002 - 4732 (orange cloud near center), Bran 226 (bottom left), and Gum 25 (bottom left). These star-forming regions are located between 4000 and 10,000 light years of the Earth. The bright green star, down to the right of the image, is a carbon star, IRAS 08535 - 4724. Image obtained by the WISE telescope (Wide - field Infrared Explorer). This image from Nasa's Wide - field Infrared Survey Explorer, or WISE, highlights several star - forming regions. There are five distinct centers of star birth in this one image alone. Star - forming nebulae (called HII regions by astronomers) are clouds of gas and dust that have been heated up by nearby stars recently formed from the same cloud. The largest, brightest cloud, in the upper right is known as Gum 22. It's named after Colin Gum, an Australian astronomer who surveyed the southern hemisphere sky in the early 1950's looking

PIX4621545

Atlas Coelestis seu Harmonia Macrocosmica by BRAHE, 1661 (engraving)

Atlas Coelestis seu Harmonia Macrocosmica by BRAHE, 1661 (engraving)

CUL4933043

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