• August 9, 2007

    Episode 113: The Space Sponge

    Download this episode


    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.