Skywatch

  • August 9, 2007

    Episode 113: The Space Sponge

    Download this episode

    Shownotes

    One of the solar system's strangest looking moons is Hyperion, which orbits the ringed planet Saturn. The Cassini spacecraft, now orbiting Saturn, photographed Hyperion a few years ago and revealed a moon that looks more like a sponge or coral than rock or ice. Now scientists think they know what causes the strange appearance.