JPL's Cassini spacecraft is making it's final approach to Saturn after seven years of whipping around our solar system. This weekend the probe flew by an outer retrograde moon, Phoebe, and based on stunning pictures unspooling today it seems Phoebe is an ice rich body, perhaps even a captured comet! If all goes well on July 1st Cassini will enter into orbit around the ringed planet and provide four years of exploration including the December landing of the 700 pound Huygens probe on Saturn's largest moon, Titan.

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