Thomas Mulligan reports on promising evidence of an ocean beneath Saturn’s moon Mimas, hinting at extraterrestrial seas.

This summer, skywatchers will be treated to a rare spectacle visible from Earth: the shadow of Saturn’s largest moon, Titan, ...

Now, another moon appears to be secretly flooded. Saturn’s moon Mimas, known for its uncanny resemblance to the Star Wars Death Star, might harbor liquid water beneath its icy shell.

Mimas looks much like our moon, with a heavily cratered surface. It didn’t host any crisscrossing lines or broken pieces like Europa. And it certainly wasn’t spewing geysers like Enceladus.

Now another moon appears to be secretly flooded. Saturn’s moon Mimas, known for its uncanny resemblance to the Star Wars Death Star, might harbor liquid water beneath its icy shell.

Saturn’s moon Mimas, floating above the planet’s rings, might conceal a liquid ocean beneath its surface. Credit: NASA/JPL/Space Science Institute The outer solar system is awash with liquid ...

Saturn’s moon Mimas, floating above the planet’s rings, might conceal a liquid ocean beneath its surface. CREDIT: NASA/JPL/SPACE SCIENCE INSTITUTE ...

Now another moon appears to be secretly flooded. Saturn’s moon Mimas, known for its uncanny resemblance to the Star Wars Death Star, might harbor liquid water beneath its icy shell.

PARIS - Saturn's small moon Mimas seems an unlikely suspect in the hunt for life in Earth's backyard - it is probably best known for looking like th ...

This Feb. 13, 2010, image provided by NASA shows Saturn’s moon Mimas and its large Herschel Crater, captured by the Cassini spacecraft. (NASA/JPL-Caltech/Space Science Institute via AP) ...

Saturn’s moon Mimas may have an ocean of liquid water beneath its icy crust, suggests a recent study. Icy moons with oceans locked away beneath miles of ice are turning out to be fairly common ...

Saturn's moon Mimas has a giant impact crater, named Hershel, that stretches across a third of its surface and makes it resemble the "Death Star" from Star Wars.