America in Transition Pages

Friday, April 22, 2016

Particles forged in the heart of a nearby supernova are still raining onto Earth today

Most of the cosmic rays that rain down on our planet today were forged in a nearby supernova that exploded no more than a few million years ago, according to a new study. 

The findings, published Thursday in the journal Science, confirm another recent study that suggests a large star in our galactic...



from L.A. Times - Science http://ift.tt/2479xWc
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