Giant molecular cloud
giant molecular cloud
A cloud of molecular hydrogen typically located in the arm of a spiral galaxy, believed to be an area of active star formation. Protostars are located in the densest regions of such clouds. See more at protostar.
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noun 1. (def 2). noun 1. See panda (sense 1)
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noun 1. any of the planets Jupiter, Saturn, Uranus, and Neptune, characterized by large mass, low density, and an extensive atmosphere