Supernova explosions in the Universe

  title={Supernova explosions in the Universe},
  author={Adam Burrows},
During the lifetime of our Milky Way galaxy, there have been something like 100 million supernova explosions, which have enriched the Galaxy with the oxygen we breathe, the iron in our cars, the calcium in our bones and the silicon in the rocks beneath our feet. These exploding stars also influence the birth of new stars and are the source of the energetic cosmic rays that irradiate us on the Earth. The prodigious amount of energy (∼10 51, or ∼2.5 × 1028 megatonnes of TNT equivalent) and… 
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