• May 24, 2012

    Episode 395: A Visit to Phoebe

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    Studies of the moons, rings and the environment of Saturn are being carried out by NASA's Cassini mission. Data on one of the planet's irregular moons, Phoebe, suggests that this object may be a planetesimal, similar in constitution to Pluto. Perhaps it drifted in from the outer solar system and was captured by Saturn.