Star Cluster NGC 6522
NGC 6522 is a globular cluster in the constellation Sagittarius. It was discovered by William Herschel on June 24, 1784. It is centered in a region of the sky known as Baade’s Window. NGC 6522 is possibly the oldest star cluster in the Milky Way, with an age of more than 12 Gigayears.
Credit: Adam Block / Mount Lemmon SkyCenter / University of Arizona
via Tumblr http://ift.tt/1nAGx2K June 24, 2014 at 11:34PM
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