Plumes of lava from massive eruptions have been seen on Jupiter's volcano-covered moon Io. The Keck II telescope in Hawaii on Thursday spied fountains of spewing molten rock over 12 square miles. "We try to look at Io at every opportunity in the hope of seeing something like this. This time we got lucky," said NASA's Ashley Davies of the Jet Propulsion Laboratory in Pasadena, Calif.
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