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Gum Nebula

   Also found in: Wikipedia 0.09 sec.

Gum Nebula

Largest known emission nebula in terms of how much of the sky it occupies as seen from Earth, extending over about 35° in the southern constellations Puppis and Vela. A complex of diffuse, glowing gas too faint to see with the unaided eye, it was discovered in the 1950s. It lies roughly 1,000 light-years from Earth and may be the remnant of an ancient supernova.
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