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Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away in the constellation Ursa Major. It has a D 25 isophotal diameter of 29.44 kiloparsecs (96,000 light-years ).
The M81 Group is a galaxy group in the constellations Ursa Major and Camelopardalis that includes the galaxies Messier 81 and Messier 82, as well as several other galaxies with high apparent brightnesses. [1] The approximate center of the group is located at a distance of 3.6 Mpc, making it one of the nearest groups to the Local Group. [1]
Messier 31 (or the Andromeda Galaxy) Messier 32; Messier 51 (or the Whirlpool Galaxy) Messier 60; Messier 77; Messier 81 (or Bode's Galaxy) Messier 84; Messier 87 (or Virgo A) Messier 104 (or the Sombrero Galaxy) Messier 105; Messier 106; Quiescent (Galaxy) (Black Hole at the center of the Andromeda Galaxy) Mrk 421; Mrk 501; NGC 821; NGC 1023 ...
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Messier 81, also known as NGC 3031 or Bode's Galaxy, is a spiral galaxy about 12 million light-years from Earth in the constellation Ursa Major. Due to its relative proximity, large size and active galactic nucleus , Messier 81 has been studied extensively by professional astronomers .
For example, Messier 1 is a supernova remnant, known as the Crab Nebula, and the great spiral Andromeda Galaxy is M31. Further inclusions followed; the first addition came from Nicolas Camille Flammarion in 1921, who added Messier 104 after finding Messier's side note in his 1781 edition exemplar of the catalogue.
The Leo Triplet, which includes the spiral galaxies M65, M66, and NGC 3628, [3] [4] [5] is located physically near the M96 Group. [10] Some group identification algorithms actually identify the Leo Triplet at part of the M96 Group.