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M82M82 (also known as NGC 3034) is a starbust galaxy in the Ursa Major constellation. The Chandra X-ray Observatory detected fluctuating X-ray emissions from the sector, appoximately 600 light-years away from the centre of M82, around 12 million light-years from Earth. Astronomers have postulated that M82 would contain the first known mid-mass black hole, of roughly 500 solar masses.See also: Messier 82, SEDS Messier pages 
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "M82".