Gum Nebula(redirected from Gum Supernova)
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(Astronomy) 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
[C20: discovered by C. S. Gum (1924–60), Australian astronomer]