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Gum Nebula

noun
1.
(astronomy) a large, almost circular, emission nebula in the constellation Vela and Puppis. Thought to be the remains of a supernova explosion 1 million years ago, it is estimated to lie 1300 light years away
Word Origin
C20: discovered by C. S. Gum (1924–60), Australian astronomer
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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