Europa, one of Jupiter’s intriguing moons, is hiding an ocean beneath its icy shell — an ocean that might harbor alien life.

The latest analysis of data from the Galileo probe reveals surprising clues about Callisto, one of Jupiter's moons. These ...

Astronomers have uncovered new evidence that Jupiter’s moon Callisto likely harbors a massive underground ocean, potentially ...

"It's like a game of billiards around the solar system, flying by a couple of planets at just the right angle and timing to ...

If true, that would make Callisto a close sibling to Europa, another moon of Jupiter. Though the existence of an ocean remains inconclusive, future spacecraft measurements should be able to ...

Jupiter's second-largest moon has more impact craters on its ... "It is possible that Europa's ocean can support life because we know that it hosts the key ingredients to support it, those being ...

Io’s long-debated magma ocean may not exist. Juno spacecraft data reveals that tidal forces deform the moon differently than ...

NASA has been preparing for their Europa Clipper mission since 2013, when the mission’s pre-project was approved. The spacecraft is roughly the length of a basketball court, making it the ...

NASA’s Europa Clipper craft was launched aboard a SpaceX rocket, aiming to conduct its first mission to study Jupiter’s icy ocean moon Europa. Photo: John Raoux/AP ...

Scientists thought this electrically conductive upper part of the moon's atmosphere ... whether Callisto is an ocean world. Close-up measurements are scheduled for NASA's Europa Clipper and ...