User talk:Joniscool98
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Supernova
[edit]I noticed your edit to the supernova page. Do you happen to have a reference for that 2009 estimate? Thank you. — RJH (talk) 18:31, 18 February 2007 (UTC)
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I noticed your edit to the supernova page. Do you happen to have a reference for that 2009 estimate? Thank you. — RJH (talk) 18:31, 18 February 2007 (UTC)[reply]