NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Lagoon nebula (M8). Coloured infrared image of the Lagoon nebula (M8). This is an emission nebula, a cloud of gas and dust that glows as the hydrogen gas it contains is ionised by the radiation from hot young stars within it. It lies 5000 light years from Earth in the constellation Sagittarius. Image taken by the Midcourse Space Experiment (MSX) satellite.
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