Located 21 million light years away in another galaxy. Still fainter than the human eye can see for now, but they say it will be visible with a pair of binoculars soon.
http://www.physorg.com/news/2011-08-instant-cosmic-classic-supernova.html
Why does it matter? Something something science *waves hand*
But c'mon, supernovae are cool <3
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There is no shame in not knowing; the shame lies in not finding out