Globular Clusters

The Hercules Globular Cluster


photo by Geoffrey Heller


Date TakenJune 27, 2009
LocationSeattle, Washington USA
Exposure26 minutes @ 120 second subs
20 minutes @ 240 second subs
ClassificationGlobular Cluster
Distance25,100 Light Years
NotesImage taken from downtown Seattle under conditions of heavy light pollution.
ExplanationM13 is about 145 light-years in diameter, and it is composed of several hundred thousand stars.