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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 ).
Huge file, very detailed, clear EV (lead image in the article on the subject), very "stop, stare, click". Already a FP on Commons, caption nabbed from the article. As with any image of this size, Dschwen's image viewer will be useful. Articles in which this image appears Messier 81, M81 Group, bulge (astronomy), unbarred spiral galaxy
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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Holmberg IX is a dwarf irregular galaxy and a satellite galaxy of M81, located in the constellation of Ursa Major.It is of the Magellanic type of Galaxy as it is similar to the Small Magellanic Cloud, neighbour galaxy to Milky Way Galaxy. [3]
It was discovered on CCD images taken April 30, 1999. [2] Located in the flocculent spiral galaxy NGC 2841, which had hosted three previous supernova events, [3] it was positioned 91″ North and 100″ West of the Galactic Center. [5] SN 1999by was identified as a Type Ia supernova on May 2, but the peculiar spectrum suggested it was ...
The group also contains the spiral galaxy Messier 81 and the starburst galaxy Messier 82. [3] NGC 4236 is located away from the central part of the M81 group at a distance of 14.5 Mly (4.45 Mpc ) from Earth .