Interactions Within The Group
Messier 81, Messier 82, and NGC 3077 are all strongly interacting with each other. The gravitational interactions have stripped some hydrogen gas away from all three galaxies, leading to the formation of filamentary gas structures within the group. Moreover, the interactions have also caused some interstellar gas to fall into the centers of Messier 82 and NGC 3077, which has led to strong starburst activity (or the formation of many stars) within the centers of these two galaxies.
Read more about this topic: M81 Group
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