M101

M 101

Roger NelsonPortfolios, Galaxies, Lists, Log Book, Messiers, NGC Objects

M 101 Messier 101,The Pinwheel Galaxy, M101 or NGC 5457, is a face-on spiral galaxy 21 million light-years (6.4 megaparsecs) away from Earth in the constellation Ursa Major. It was discovered by Pierre Méchain in 1781[a] and was communicated that …