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Saturday, December 25, 2004

Lagoon Nebula

(catalog numbers NGC 6523 and M8), ionized-hydrogen region located in the constellation Sagittarius at 1,200 parsecs (3,900 light-years) from the solar system. The nebula is a cloud of interstellar gas and dust approximately 10 parsecs (33 light-years) in diameter. A group of young, hot stars in the cloud ionize the nearby gas. As the atoms in the gas recombine, they produce the light emitted by

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