Andromede Galaxy (M31) infrared view - The Andromeda galaxy seen in infrared - This image...

Andromede Galaxy (M31) infrared view - The Andromeda galaxy seen in infrared - This image shows the difference in infrared radiation between the light emitted by the aged stars (blue) and that emitted by the dust (star-forming zone, yellow and red). This image obtained by the WISE satellite also distinguishes the two Andromede satellite galaxies, M32 (above the nucleus of the Andromede galaxy) and NGC 205 (M110) below. Infrared composite at the following wavelengths: 3.4 and 4.6 microns (blue), 12 microns (green), and 22 microns dust sensitive, red. M31, is captured in full in this new image from Nasa's Wide - field Infrared Survey Explorer, or WISE. The mosaic covers an area equivalent to more than 100 full moons, or five degrees across the sky. WISE used all four of its infrared detectors to capture this picture (3.4 - and 4.6 - micron light is colored blue; 12 - micron light is green; and 22 - micron light is red). Blue highlights mature stars, while yellow and red show dust heated by newborn, massive stars. Andromeda is the closest large galaxy to our Milky Way galaxy, and is located 2.5 million light - years from our sun. It is close enough for telescopes to spy the details of its ringed arms of new stars and hazy blue backbone of older stars. Also seen in the mosaic are two satellite galaxies, known as M32, located just a bit above Andromeda to the left of center, and the fuzzy blue M110, located below the center of the great spiral arms. These satellites are the largest of several that are gravitationally bound to Andromeda. The Andromeda galaxy is larger than our Milky Way and contains more stars, but the Milky Way is thought to perhaps have more mass due to its larger proportion of a mysterious substance called dark matter. Both galaxies belong to our so - called Local Group, a collection of more than 50 galaxies, most of which are tiny dwarf systems. In its quest to map the wh