The Cigar irregular galaxy in Ursa Major is about 11 million light years away. It seems to be exploding in the center, and astronomers first believed this was from a single large explosion. Now they think a large amount of massive stars formed in the center of the galaxy, these massive stars eventually went supernova and the many supernovas are making the large amounts hydrogen gas flow outward from the center.
Camera: SBIG ST-10XME
Filters: Astrodon LRGB
Dates: December 3, 2005, Ha on Jan 5-8, 2006
Exposure: Ha=18x20min (360mins), RGB=3x5min each for 405 minutes (6.75hrs) total at -30C