Globular Cluster M55
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| Globular Cluster M55 (also known as Messier Object 55 or NGC 6809) is a globular cluster in the constellation Sagittarius. It was discovered by Nicolas Louis de Lacaille in 1751 and catalogued by Charles Messier in 1778. M55 is at a distance of about 17,300 light years away from Earth. Only about half a dozen variable stars have been discovered in M55. External links
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