SN 2008D: First Supernova Observed Live (Fact of the Day)


SN 2008D is the first supernova to be observed live using a telescope. It was detected on 9 January 2009 using NASA's Swift X-ray telescope. It was observed in the spiral galaxy NGC 2770 which lies about 88 million light years away. The expansion rate of the supernova SN 2008D was calculated to be more than 10,000 km per second. This was the first time the x-ray emission pattern of a supernova was captured at the moment of its birth and this only lasted for about 5 minutes.

Image Credit: Kennislink
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