jul 172013
Anne's Image of the Day: Globular Cluster Messier 5

July 17, 2013 Messier 5, a globular cluster in Serpens Image Credit & Copyright: Adam Block/Mount Lemmon SkyCenter/University of Arizona (http://skycenter.arizona.edu/gallery/starclusters/m5) Messier 5 (also known as NGC 5904) is a globular cluster of about 165 light-years across, while it gravitationally dominates a spherical volume of over 400 light-years across, making it one of the larger [continue reading]