k Pinwheel Galaxy, UV and optical image Pinwheel Galaxy M101, NGC 5457, combined optical and ultraviolet UV image. The ultraviolet areas blue, mainly seen in the galactic spiral arms, show the presence of newlyformed stars only a few million years old. The faint green light that is also seen in the spiral arms, marks stars that are more than 100 million years old. The orange glow of the centre of the galaxy shows that these stars are over a billion years old. This shows how UV astronomy can reveal stellar evolution within a galaxy. M101 is over 170,000 light years across. and is around 27 million light years away in the constellation Ursa Major. UV data obtained by the GALEX satellite in 2003. Stock Photo - Afloimages
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Pinwheel Galaxy, UV and optical image Pinwheel Galaxy M101, NGC 5457 , combined optical and ultraviolet UV image. The ultraviolet areas blue , mainly seen in the galactic spiral arms, show the presence of newly formed stars only a few million years old . The faint green light that is also seen in the spiral arms, marks stars that are more than 100 million years old. The orange glow of the centre of the galaxy shows that these stars are over a billion years old. This shows how UV astronomy can reveal stellar evolution within a galaxy. M101 is over 170,000 light years across. and is around 27 million light years away in the constellation Ursa Major. UV data obtained by the GALEX satellite in 2003.
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Pinwheel Galaxy, UV and optical image

Pinwheel Galaxy (M101, NGC 5457), combined optical and ultraviolet (UV) image. The ultraviolet areas (blue), mainly seen in the galactic spiral arms, show the presence of newly-formed stars (only a few million years old). The faint green light that is also seen in the spiral arms, marks stars that are more than 100 million years old. The orange glow of the centre of the galaxy shows that these stars are over a billion years old. This shows how UV astronomy can reveal stellar evolution within a galaxy. M101 is over 170,000 light years across. and is around 27 million light years away in the constellation Ursa Major. UV data obtained by the GALEX satellite in 2003.

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