“When the Deep Impact probe hit Comet 9P/Tempel, there was almost no change in brightness. … This outburst by Comet Holmes is extreme!”

On the unprecedented brightening of Comet Holmes, as quoted in "Mystery Comet Explodes into Brightness" (26 October 2007) at Physorg.com http://www.physorg.com/news112622756.html. Within the space of a few hours between 23-24 October 2007 it brightened from a very dim and obscure object requiring powerful telescopes to see into one easily visible to the naked eye.

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Brian G. Marsden 6
British astronomer 1937–2010

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