this is pretty cool..
Saturn's Moon Iapetus is the Yin-and-Yang of the Solar System
Scientists on the Cassini mission to Saturn are poring through hundreds of images returned from the Sept. 10 flyby of Saturn's two-toned moon Iapetus. Pictures returned late Tuesday and early Wednesday show the moon's yin and yang -- a white hemisphere resembling snow, and the other as black as tar.
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Your tax dollars at work Ladies and Gentlemen! Not bad for a few billion a year...Who has better pictures of Saturn?