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Lagoon Nebula; Trifid Nebula
Sagittarius
Sagittarius is a constellation which contains several well-known nebulae. These include the Lagoon Nebula (Messier 8), the Omega Nebula (Messier 17) which is also known as the Horseshoe Nebula or Swan Nebula, and the Trifid Nebula (Messier 20).
The Crab Nebula is a nebula.
The Blue Lagoon