SUMMARY: The ringed planet Saturn has some of the most turbulent weather in the Solar System, including a powerful polar vortex at its southern pole. But new observations by the giant Keck 1 telescope in Hawaii have turned up a mystery. Unlike the other planets with polar vortexes, which are generally much colder than the surrounding atmosphere, Saturn's is warmer - in fact, it's the warmest place on the planet. One theory is that particles in Saturn's atmosphere, which could warm the planet through a greenhouse effect, have been concentrated by winds down to the south pole.

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