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An Ocean Emerges on Europa

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Science  18 Apr 1997:
Vol. 276, Issue 5311, pp. 355
DOI: 10.1126/science.276.5311.355a

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Summary

The latest views of Jupiter's moon Europa by the Galileo spacecraft offer the strongest evidence yet of a subterranean ocean. Galileo's dramatic photos show a surface that resembles the Arctic Ocean, with large icebergs floating in a "sea" of refrozen water.