NASA'S Chandra Turns up Black Hole Bonanza in Galaxy Next Door

Using data from NASA's Chandra X-ray Observatory, astronomers have discovered an unprecedented bonanza of black holes in the Andromeda Galaxy, one of the nearest galaxies to the Milky Way.

via NASA Breaking News

http://www.nasa.gov/home/hqnews/2013/jun/HQ_13-181_Chandra_Black_Hole_Bonanza.html