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Supernova remnants produce cosmic rays




New findings by NASA's Fermi show that two supernova remnants accelerate protons to near light speed.

   

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Comment icon #1 Posted by MedicTJ on 15 February, 2013, 15:19
In the Youtube video, the narrator says, "About 2 or 3 times a century, a massive star in our galaxy explodes." I was under the impression that this only happens in the Milky Way about once every 500 years?
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