Summary #1294

Stellar explosion in Earth's proximity

phys.org
  • Scientists found evidence of a supernova explosion near the Earth around 2.5 million years ago.
  • The conclusion is based on using accelerator mass spectrometry to analyse manganese crust samples that are around 2.5 million years old.
  • A supernova causes the formation of iron, manganese and other heavy elements, and scientists can identify a supernova by finding just a few of the right atoms.
  • They found manganese-53 which comes from cosmic dust that rains down on Earth, as opposed to manganese-55 that occurs on Earth.

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