Lagoon Nebula

The Lagoon Nebula (catalogued as Messier 8 or M8, and as NGC 6523) is a giant interstellar cloud in the constellation Sagittarius. It is classified as an emission nebula and as an H II region.

The Lagoon Nebula was discovered by Guillaume Le Gentil in 1747 and is one of only two star-forming nebulae faintly visible to the naked eye from mid-northern latitudes. Seen with binoculars, it appears as a distinct oval cloudlike patch with a definite core. A fragile star cluster appears superimposed on it.

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Sagittarius (constellation) - Notable Features - Deep-sky Objects
... constellation contains nebulae such as the Lagoon Nebula (Messier 8), near λ Sagittarii, the Omega Nebula (Messier 17), also known as the Swan or ... The grouping of the Lagoon Nebula, the Trifid Nebula, and NGC 6559 is often called the Sagittarius triplet ... The Omega Nebula (M17, the Loon Nebula, The Swan Nebula, or the Horseshoe Nebula) is a fairly bright nebula in Sagittarius it has an integrated ...