Gum Nebula
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Gum Nebula (Gum 12) is an emission nebula that can be found in the southern constellations Vela and Puppis. Hard to distinguish, it is believed to be the greatly expanded (and still expanding) remains of a supernova that took place about a million years ago. The nebula is out of sight from most of the United States and Europe.
It is named after its discoverer, the Australian astronomer Colin Stanley Gum (1924-1960). Gum had published his findings in 1955 in a work called A study of diffuse southern H-alpha nebulae.
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