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Old 19-03-2013, 10:38 PM
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ChrisM
Sandy Ridge Observatory

ChrisM is offline
 
Join Date: Mar 2008
Location: Gippsland, VIC
Posts: 768
Blue colour

Thanks all for the comments.

I've just realised why the SN appears blue, and that is because of the blue shift (as opposed to red shift) of the hot gas speeding towards us.

Chris
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