News

  1. Planetary Science

    Mars has nighttime snow storms

    When clouds of water-ice particles cool at night, snow starts to fall rapidly on Mars, simulations suggest. The squalls could explain observations made by the Phoenix lander in 2008.

    By Ashley Yeager
  2. Astronomy

    Eclipse watchers will go after the biggest solar mystery: Why is the corona so hot?

    Usually when you move away from a heat source, it gets cooler. Not so in the sun’s atmosphere.

    By Lisa Grossman
  3. Astronomy

    Does the corona look different when solar activity is high versus when it’s low?

    Carbondale, Ill., will get two eclipses in a row, seven years apart — making it the perfect spot to watch the solar cycle in action.