Globular Cluster M3.

This huge ball of stars predates our Sun. Long before humankind evolved, before dinosaurs roamed , and even before our Earth existed, ancient globs of stars condensed and orbited a young Milky Way Galaxy . Of the 200 or so globular clusters that survive today, M3 is one of the largest and brightest, easily visible in the Northern hemisphere with binoculars. M3 contains about half a million stars, most of which are old and red. Light takes about 100,000 years to reach us from M3, which spans about 150 light years . The above picture is a composite of blue and red images.