Scientists say Jupiter’s largest moon definitely has an ocean

March 13, 2015 9:12 PM

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Jupiter's largest moon, Ganymede, has an underground ocean that contains more water than Earth, broadening the hunt for places in the solar system where life might be able to exist. Researchers said that aurorae glimpsed by the Hubble Telescope helped confirm the long-suspected subsurface saltwater on Ganymede, the largest moon in the solar system.

The Galileo spacecraft, which arrived at Jupiter in 1995, had already detected a possible magnetic field on Ganymede. The Hubble confirmed that discovery by observing changes in the aurorae around the moon.

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