News & AnalysisPlanetary Science

Cassini Spies an Ocean Inside Saturn's Icy, Gassy Moon Titan

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Science  29 Jun 2012:
Vol. 336, Issue 6089, pp. 1629
DOI: 10.1126/science.336.6089.1629

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To understand a planetary body, its origins and its history, it helps to look inside it. Planetary scientists have now done just that in the case of Saturn's big moon Titan, one of the solar system's most enigmatic bodies. Using only the subtly varying pitch of radio transmissions from the Cassini probe as it repeatedly flew by Titan, Cassini scientists report online this week in Science that they have divined an ocean of water 100 kilometers beneath Titan's icy surface.