For decades. researchers have theorized that resting beneath Callisto's pockmarked surface is a liquid saltwater ocean that spans the entire moon. After taking a closer look at data from 30 years ...

The team believes there are two major problems with the idea that the plumes come from an underground ocean. First, it would be very difficult for a crack to cut all the way through the moon's ...

The ocean on Ganymede may have more water than all the water on Earth. In this artist’s concept, the moon Ganymede orbits the giant planet Jupiter. NASA’s Hubble Space Telescope observed ...

Hopes for alien life dim as doubts emerge over exoplanet K2-18b chemical signals May 24, 2025. Possible sign ... Callisto, Jupiter's moon, is likely an ocean world, ...

Callisto, Jupiter's second-largest moon, may have a rocky surface with an ocean beneath the surface. If there was a contest for the most interesting moon in our solar system, Callisto would be a ...