ScienceDownEast | ScienceDownEast Astrophotography | Clusters | M15 | Messier 15 Globular Cluster

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 12.5±1.3 billion years old, it is one of the oldest known globular clusters. - Wikipedia

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