PerspectivePlanetary Science

Active Volcanism on Io

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Science  27 Sep 2002:
Vol. 297, Issue 5590, pp. 2220-2221
DOI: 10.1126/science.1076908

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Io, one of Jupiter's moons, has hundreds of active volcanoes, many of which are erupting high-temperature silicate lavas. In his Perspective, McEwen reviews how data returned by the Galileo spacecraft have helped to resolve some questions regarding Io's volcanism but have raised others, especially regarding the moon's internal structure.