M81 M82 1231-1298 DSS 4calAug20 Auto PI DC DBE BN CC TGV MMT HT SCNR MMTCopy 2-20200624.jpg

The galaxies Messier 81 (left) and Messier 82 (right) in Ursa Major. Both are 12 million light-years from Earth and are physically near each other. M81 is a grand-design spiral galaxy, and M82 is a starburst galaxy, thought to be triggered by its close encounter to the more-massive M81.

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