Posted by anonymous on Saturday, November 29, 2008 at 2:28am.
There are a couple of statements that might help you decide. One is observing many galaxies and another in the Milky Way Galaxy:
http://en.wikipedia.org/wiki/Supernova#Discovery
Sra
I Googled and reviewed a lot of articles on the subject and could not find a clear answer. It seems to depend upon whether you are talking abut Type I or Type II supernovae.
I had thought that spiral galaxies were younger and had more star formation going on in the arms, and that supernovae caused by very massive stars would mainly be in the younger galaxies, since exploding supernovae tend to be young and burn out early, but that is more complicated than that
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