Does Saturn’s Moon Mimas Have a Hidden Ocean?

Rebecca Jean T.
7 min readFeb 13, 2024

A study published in Nature on February 7th may have just found evidence that Saturn’s moon Mimas has an ocean under its surface. Researchers believe that if this distant world contains an ocean, it is hidden 12 to 19 miles beneath the surface and is relatively young.

A black and white image of Mimas, a round moon with many small craters on its surface. On the right, a large crater with a small raised portion in the center.
Image of Saturn’s moon Mimas taken by NASA’s Cassini space probe in 2010. The image features Mimas’ famous Herschel crater, which has given it the nickname “Death Star” for its uncanny resemblance to the Star Wars planet destroyer. Credit: NASA / JPL-Caltech / Space Science Institute.

Evidence in Mimas’ Rotation and Orbit

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Rebecca Jean T.

Published author on NASA’s Radio Jove newsletter and contributing writer for Aha!. Researching science topics to deliver to you in bite-sized stories.