Celestial hemisphere:  Northern  ·  Constellation: Hercules (Her)  ·  Contains:  Hercules Globular Cluster  ·  M 13  ·  NGC 6205
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M31 The Great (Globular) Star Cluster in the constellation of Hercules, Phil Swift
M31 The Great (Globular) Star Cluster in the constellation of Hercules
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M31 The Great (Globular) Star Cluster in the constellation of Hercules

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M31 The Great (Globular) Star Cluster in the constellation of Hercules, Phil Swift
M31 The Great (Globular) Star Cluster in the constellation of Hercules
Powered byPixInsight

M31 The Great (Globular) Star Cluster in the constellation of Hercules

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Description

M13, also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules is a globular cluster of several hundred thousand stars.

It was discovered by Edmond Halley in 1714.

In the night sky it is about one third of the way from Vega to Arcturus, four bright stars in the constellation of Hercules form the Keystone asterism.

M13 can be seen partway between Zeta Herculis and Eta Herculis.

Although only telescopes with great light-gathering capability fully resolve the stars of the Cluster, M13 can be visible to the naked eye in dark skies.

With a low-power telescope, Messier 13 looks like a comet or fuzzy patch.

Binoculars make the Hercules Globular Cluster look similar to a small round patch of light.

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M31 The Great (Globular) Star Cluster in the constellation of Hercules, Phil Swift