Saturday, July 25, 2015

The "M31" Galaxy

Ultraviolet rings of M31

This also called as spiral galaxy. This is just 2.5 million light years away from Andromeda Galaxy.
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   A mere 2.5 million light-years away the Andromeda Galaxy, alsoknown as M31, really is just next door as large galaxies go.So closeand spanningsome 260,000 light-years, it took 11 different image fields from theGalaxy Evolution Explorer (GALEX) satellite'stelescope to produce this gorgeous portrait of the spiral galaxy inultraviolet light.While its spiral arms stand out invisible light images of Andromeda,the arms look more like rings intheGALEX ultraviolet view,a view dominated by the energetic light from hot, young, massive stars.As sites of intense star formation, the rings have been interpreted asevidence Andromeda collided with its smaller neighboring ellipticalgalaxy M32 more than 200 million years ago.The large Andromeda galaxyand our own Milky Way are the most massive members of thelocalgalaxy group.


Image credits: NASA, Hubble space telescope

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