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Fiery Io Models Earth's First Days

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Science  17 Apr 1998:
Vol. 280, Issue 5362, pp. 381-382
DOI: 10.1126/science.280.5362.381

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HOUSTON-- Using sophisticated instruments aboard the Galileo spacecraft orbiting Jupiter, researchers reported last month at the annual Lunar and Planetary Science Conference here that they have observed a surface temperature of about 1800 kelvins on Jupiter's moon Io, the most volcanically active body known. Planetary geologists say that these high temperatures imply a type of volcanism not seen on Earth for billions of years, meaning that scientists can use Io as a volcanological laboratory to test models of terrestrial volcanism.