Messier 18 was discovered and catalogued in 1764 by Charles Messier--for whom the Messier Objects are named--during his search for comet-like objects. It lies within the Milky Way, approximately 4600 light-years away in the constellation of Sagittarius, and consists of many sibling stars loosely bound together in what is known as an open cluster.
Messier 18 was discovered and catalogued in 1764 by Charles Messier--for whom the Messier Objects are named--during his search for comet-like objects. It lies within the Milky Way, approximately 4600 light-years away in the constellation of Sagittarius, and consists of many sibling stars loosely bound together in what is known as an open cluster.
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