Supernova explosions play an important role in the habitability of the planet by increasing cosmic ray levels and causing mutations. In the case of Earth, these events enriched the protosolar nebula with heavy elements. The Solar System is currently at the center of the Local Bubble, an expanding region of plasma created by 15 supernova explosions over the last 15 million years.
Scientists led by Caitlin Nojiri of the University of California, Santa Cruz, analyzed sedimentary rocks containing iron-60 deposits to estimate the timing of the supernova’s impact. Their findings point to a supernova explosion in the Upper Centauri-Kurt or Tukan-Saat association about 2.5 million years ago.
Source: Ferra
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