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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]
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Other astronomers, using side notes in Messier's texts, eventually filled out the list up to 110 objects. [9] The catalogue consists of a diverse range of astronomical objects, from star clusters and nebulae to galaxies. For example, Messier 1 is a supernova remnant, known as the Crab Nebula, and the great spiral Andromeda Galaxy is M31.
Messier 82 (also known as NGC 3034, Cigar Galaxy or M82) is a starburst galaxy approximately 12 million light-years away in the constellation Ursa Major. It is the second-largest member of the M81 Group , with the D 25 isophotal diameter of 12.52 kiloparsecs (40,800 light-years ).
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 .
Messier 81. Voting period is over. Please don't add any new votes. Voting period ends on 19 Aug 2010 at 13:43:51 (UTC) Original - Messier 81 is a spiral galaxy about 12 million light-years away in the constellation Ursa Major. Reason Huge file, very detailed, clear EV (lead image in the article on the subject), very "stop, stare, click".
M82 X-1 is an ultra-luminous X-ray source located in the galaxy M82. It is a candidate intermediate-mass black hole , with the exact mass estimate varying from around 100 to 1000 solar masses. [ 1 ] [ 2 ] [ 3 ] One of the most luminous ULXs ever known, its luminosity exceeds the Eddington limit for a stellar mass object.