Wednesday, May 31, 2006
Roll Over EnceladusScientists may have uncovered why the icy moon's hot spot is at the south pole. We've known that small irregularly shaped moons align their long axis toward the large planet. To visualize, a city-sized moon shaped like a potato would point it's long end toward the planet. With lighter liquid water on one end of the moon, it would flip over (gradually, of course) and the heavier portion of the moon (rock) would align toward Saturn, leaving the water at one of the poles.