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Cassini Completes Titan Flyby, Prepares for Iapetus
Raw image of Titan taken September 2, 2007 Image right: Raw image of Titan taken September 2, 2007. Image credit: NASA/JPL/Space Science Institute
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Cassini successfully flew by Titan on Aug. 31, 2007, imaging the Huygens probe landing site and studying the composition and geology of Titan's surface. This flyby placed Cassini on a course to conduct the closest flyby of the odd moon Iapetus that it will perform during the entire mission. On Sept. 10, Cassini will come about 1,640 kilometers (1,000 miles) from Iapetus' surface.

Iapetus is a world of sharp contrasts. The leading hemisphere is as dark as a freshly-tarred street, and the white, trailing hemisphere resembles freshly-fallen snow. Scientists want to know more about the composition of the dark material that coats Iapetus. They also want to learn more about Iapetus' distinctive walnut shape and the chain of mountains along its equator.

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