Space and Astronomy Atlas

How The Universe Works
Celestial Objects

Hercules Globular Cluster

Star Clusters

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The Hercules Globular Cluster, catalogued as Messier 13, is a globular cluster of several hundred thousand stars in the constellation Hercules. It ranks among the brightest globular clusters visible from the Northern Hemisphere and is a familiar target for amateur telescopes, its dense core of ancient stars packed into a roughly spherical volume many light-years across.

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