H. E. Smith Winter 1999
|Gene Smith's Astronomy Tutorial
Galaxies - The Sb Galaxy M81
Messier 81 is the largest member of a small group in the direction of Ursa Major (The Big Bear/Dipper) 12 million light-years away from our Galaxy. M81 has been shown to have a very faint active Seyfert nucleus.
See Bill Keel's series of M81 images at different wavelengths.