Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5422  ·  NGC 5443  ·  NGC 5457  ·  NGC 5473  ·  NGC 5474  ·  NGC 5485
Messier 101 - Pinwheel Galaxy and friends, LittleKing
Messier 101 - Pinwheel Galaxy and friends
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Messier 101 - Pinwheel Galaxy and friends

Messier 101 - Pinwheel Galaxy and friends, LittleKing
Messier 101 - Pinwheel Galaxy and friends
Powered byPixInsight

Messier 101 - Pinwheel Galaxy and friends

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Description

Big, beautiful spiral galaxy M101 is one of the last entries in Charles Messier's famous catalog, but definitely not one of the least. About 170,000 light-years across, this galaxy is enormous, almost twice the size of our own Milky Way galaxy. M101 was also one of the original spiral nebulae observed by Lord Rosse's large 19th century telescope, the Leviathan of Parsontown. M101 shares this modern telescopic field of view with spiky foreground stars within the Milky Way, and more distant background galaxies. The colors of the Milky Way stars can also be found in the starlight from the large island universe. Its core is dominated by light from cool yellowish stars. Along its grand spiral arms are the blue colors of hotter, young stars mixed with obscuring dust lanes and pinkish star forming regions. Also known as the Pinwheel Galaxy, M101 lies within the boundaries of the northern constellation Ursa Major, about 25 million light-years away.

(Source : APOD)

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Messier 101 - Pinwheel Galaxy and friends, LittleKing