[aerohead]

PBS WorldChannel.com is also broadcasting a series on our solar system.
The other night was devoted to Saturn.
From the two fly-bys of the Voyager mission, and 13-years of space-based monitoring by the Cassini spacecraft, the Jet Propulsion Laboratory's been able to piece some of Saturn's puzzle together a bit better.
From the science:
* Saturn currently has 62- moons.
* Saturn formerly had 63- moons.
* At the time of the dinosaurs, Saturn had no rings.
* Moon # 63's orbit strayed too close to the planet, exceeding the 'Roche-limit'. Tidal forces ripped the moon (about 250-miles diameter[ 402- km ] ) apart, and within, as short as 3-days, 17,000-trillion tons of remnant pieces were distributed to create the rings.
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Saturn's moon Enceledus is also undergoing a gravitational tug-of-war with the planet and moon Dione, experiencing major surface fractures, creating 500- pound/ second water vapor geyser plumes from the surface