Hyperphysics defines a supernova as:

"An explosion of a massive supergiant star. It may shine with the brightness of 10 billion suns! The total energy

output may be 1044 joules, as much as the total output of the sun during its 10 billion year lifetime."



SUPER facts about SUPERnovæ

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I like all of these topics. - - - leesonma 22:16, February 6, 2011 (UTC)

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