Celestial hemisphere:  Northern  ·  Constellation: Perseus (Per)  ·  Contains:  7 chi Per  ·  Double cluster  ·  Misam  ·  NGC 869  ·  NGC 884  ·  The star 7Per
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The Double Cluster, Gabe Shaughnessy
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The Double Cluster

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The Double Cluster, Gabe Shaughnessy
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The Double Cluster

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The Double Cluster is a pair of open clusters in the constellation Perseus and lie some 7500 light years away. Both visible with the naked eye, NGC 869 and NGC 884 lie at a distance of 7500 light years. NGC 869 has a mass of 3700 solar masses and NGC 884 weighs in at 2800 solar masses; however, later research has shown both clusters are surrounded with a very extensive halo of stars, with a total mass for the complex of at least 20,000 solar masses. Based on their individual stars, the clusters are relatively young, both 12.8 million years old.

Source: Wikipedia

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The Double Cluster, Gabe Shaughnessy