Saturn’s moon Mimas may have a subocean

Astronomers discover enormous evidence that a geologically young ocean exists beneath the icy crust of Saturn’s moon Mimas. A French-led research team observed changes in Mimas’s orbit and rotation and reported that a hidden ocean 12 to 18 miles ( 20 to 30 kilometers) beneath the icy crust was more likely a prolonged rocky core. […]

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