M82 (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 (http://www.seds.org/messier/m/m082.html), SEDS Messier pages