From Wikipedia, the free encyclopedia "Messier 15 or M15 is a globular cluster in the constellation Pegasus. It was discovered by Jean-Dominique Maraldi in 1746 and included in Charles Messier's catalogue of comet-like objects in 1764. At an estimated 12.0 billion years old, it is one of the oldest known globular clusters." |
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Date : September 2012 Location : Backridge Observatory, Spruce Knob, West Virginia Equipment used :
Exposure Detail : RGB stack of 30sec, 60sec, and 120sec using Photoshop Merge to HDR
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