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Messier 101
Credit: Giuseppe Donatiello
RA 14h 03m 12.6s Dec +54° 20′ 57″
Messier 101 (NGC 5457) is a face-on spiral galaxy distanced 21 million light-years (6 Mpc) in the constellation Ursa Major and it was discovered by Pierre Méchain on March 27, 1781.
M101 is a large galaxy comparable in size to the Milky Way. With a diameter of 170,000 light-years it is roughly equal the size of the Milky Way. It has a disk mass on the order of 100 billion solar masses, along with a small central bulge of about 3 billion solar masses.
Messier 101
Credit: Giuseppe Donatiello
RA 14h 03m 12.6s Dec +54° 20′ 57″
Messier 101 (NGC 5457) is a face-on spiral galaxy distanced 21 million light-years (6 Mpc) in the constellation Ursa Major and it was discovered by Pierre Méchain on March 27, 1781.
M101 is a large galaxy comparable in size to the Milky Way. With a diameter of 170,000 light-years it is roughly equal the size of the Milky Way. It has a disk mass on the order of 100 billion solar masses, along with a small central bulge of about 3 billion solar masses.