News

  1. Earth

    Catastrophic solar storms may not explain shadows of radiation in trees

    Tree rings record six known Miyake events — spikes in global radiation levels in the past. The sun, as long presumed, might not be the sole culprit.

    By Nikk Ogasa
  2. Astronomy

    Part of a lost, ancient star catalog has now been found

    Greek astronomer Hipparchus may be the first to try to precisely map the stars. His lost work turned up on parchment that had been erased and reused.

    By Lisa Grossman
  3. Astronomy

    Astronomers have found the closest known black hole to Earth

    Discovered by how it pushes around a companion star, the black hole is about 1,500 light-years away and roughly 10 times the mass of the sun.