News

  1. Planetary Science

    Planet Hunt Strikes Rock: Hot kin of Earth orbits nearby star

    Astronomers have found the closest known cousin to Earth, a solid world just 15 light-years beyond the solar system.

    By Ron Cowen
  2. Astronomy

    Making waves

    Locked in a deadly embrace, two white dwarf stars may be the strongest source of gravitational waves now flooding our galaxy.

    By Ron Cowen
  3. Astronomy

    The supernova that wasn’t

    A brilliant stellar outburst once thought to be a supernova explosion actually left the star intact.

    By Ron Cowen
  4. Astronomy

    Andromeda gets bigger

    A new study reveals that the diameter of the Andromeda galaxy's disk spans some 220,000 light-years, three times as big as had been estimated.