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by Answerbag Staff on February 26th, 2011

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Which two moons of Jupiter might have an ocean of liquid water beneath their frozen surfaces?

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  • by Bertha M. Chambers on February 26th, 2011

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    As of 2011, scientists believe that three, not two, of Jupiter's moons may have saltwater oceans beneath their thick ice crusts: Europa, Callisto and Ganymede. Changes in each moon's magnetic field when near Jupiter indicate electric currents flowing through the moons, and saltwater conducts electricity better than ice does.

    References:

    NASA: Astronomy Picture of the Day: Europa: Ancient Water World

    NASA: "Strong Evidence of Ocean Water on Europa;" Aug. 25, 2005

    NASA: "Solar System's Largest Moon Likely Has a Hidden Ocean;" Dec. 16, 2000

    NASA: Astronomy Picture of the Day: Oceans Under Jupiter's Moon Ganymede?

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