Research topic: Hercules cluster

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Hercules cluster

The Columbia Encyclopedia, Sixth Edition
Hercules cluster giant globular star cluster in the northern constellation Hercules ; cataloged as M13 or NGC 6205. The cluster is just visible to the naked eye and is the best example of a globular cluster visible in the Northern Hemisphere. Its angular diameter is about 2/3 that of the full moon, and its linear diameter is 100 light-years . The entire cluster contains perhaps 100,000 or more stars. In its central portion, the stars are so close together that they cannot be resolved, despite the cluster's relatively near distance of 35,000 light-years; the separation between stars... Read more
Hercules Cluster
Hercules Cluster A loose, irregular cluster of galaxies some 500 million l.y. away in the constellation Hercules; also known as Abell 2151. The cluster is 1°.7 wide as seen from Earth, has a true diameter... Read more
Hercules
...Corona Borealis. It is traditionally depicted as the hero Hercules in a kneeling position. There are no very bright stars in Hercules and only three of third magnitude, the brightest of which...in the sky. The constellation contains the globular star cluster M13, barely visible to the naked eye but ... Read more

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Great Hercules Cluster on Starry Night

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