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Open Cluster M18 (also known as Messier Object 18, Messier 18, M18, or NGC 6613) is an open cluster in the Sagittarius constellation. It was discovered by Charles Messier in 1764. M18 is situated between the Omega Nebula M17 and the Star Cloud M24. Its age is estimated at 32 million years.

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Messier 18, SEDS Messier pages

Messier objects NGC objects Open clusters Sagittarius constellation

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