Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5447  ·  NGC 5449  ·  NGC 5450  ·  NGC 5451  ·  NGC 5453  ·  NGC 5455  ·  NGC 5457  ·  NGC 5461  ·  NGC 5462  ·  NGC 5471  ·  NGC 5473  ·  NGC 5477  ·  Pinwheel galaxy
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M101 Pinwheel Galaxy, Edward Overstreet
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M101 Pinwheel Galaxy, Edward Overstreet
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Description

Messier 101 is a very large, relatively nearby, face-on spiral galaxy in the constellation Ursa Major. It is also known as the Pinwheel Galaxy.

M 101 was one of the first "spiral nebulae" identified by William Parsons, the third Earl of Rosse. Lord Rosse observed M 101 in his 72-inch Newtonian reflector in 1851, and made several sketches; he was the first to note its spiral structure.  *Sky Safari Pro 6

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M101 Pinwheel Galaxy, Edward Overstreet