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Lagoon Nebula (Messier 8) is a massive star-forming region located in the direction of the Sagittarius constellation. This nebula is one of the few that can be observed with the naked eye from Earth. Approximately 4,100 light-years away, the Lagoon Nebula contains a vast cloud of hydrogen gas and numerous young stars currently forming within it. Classification and Structure The Lagoon Nebula is classified as an emission nebula. Such nebulae consist of ionized gas illuminated by intense ultraviol