Andromeda Galaxy, M31

The closest large galaxy to our own, at a distance of about 2.5 million light-years. It is a spiral galaxy that appears to be slightly larger but less massive than the Milky Way.

Radio Programs

More Andromeda Galaxy Getting ready to put on a show Thursday, September 17, 2015
Andromeda Galaxy Taking in all of a giant galaxy Wednesday, September 16, 2015
Deep Vision Looking deep into the universe Saturday, December 20, 2014
Triangulum Galaxy A galaxy that’s losing its identity Sunday, November 10, 2013
Andromeda Galaxy III Building a galactic giant Saturday, November 9, 2013
Andromeda Galaxy II Black holes in a neighboring galaxy Friday, November 8, 2013
Andromeda Galaxy A journey into the distant past Thursday, November 7, 2013
Bright Black Hole Brightness from the ultimate darkness Wednesday, January 30, 2013
M31’s Central Cluster Bright stars around a galaxy’s dark heart Tuesday, January 29, 2013
Collision Course Taking aim at another galaxy Wednesday, September 12, 2012
Andromeda Galaxy A galactic twin in the evening sky Tuesday, September 11, 2012
Andromeda Galaxy Looking deep into the universe Tuesday, October 25, 2011

Featured Images

The Andromeda galaxy, M31
Old News Saturday, December 20, 2014
Close-up of the core of M31
M31 Blues Tuesday, January 29, 2013
Andromeda and the Milky Way head for a galactic pile-up
Collision Course Wednesday, September 12, 2012
Starry Neighbor Friday, February 26, 2010


©2015 The University of Texas McDonald Observatory