Messier 13
The Great Globular Cluster in Hercules
May 19, 2003
One of the most prominent Northern Hemisphere globular clusters, M13 is visible with the naked eye from sufficiently
darkened locations. At a distance of 25,100 light years, this massive cluster spans 165 light years in breadth and is
comprised of a half million ancient stars created during the earliest of stellar-forming sequences.

Taken with a Canon 10D digital SLR through an 8" Mak-Newt equipped with a TeleVue 2X Powermate. A series of
eighteen 210 second shots at ISO 800 were combined and processed using
Images Plus software.