Messier 15 (M15) – The Great Pegasus Cluster

The M15 Globular Cluster (aka. Great Hercules Cluster). Astronomers suspect the existence of one or more intermediate-mass black holes at its heart. Credit: NASA/ESA/HST

Located in the Pegasus constellation, some 33,600 light years from Earth, is the M15 Great Pegasus Cluster, one of the oldest objects in the night sky

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