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

Astronomers have uncovered new evidence that Jupiter’s moon Callisto likely harbors a massive underground ocean, potentially joining Europa and ... s ionosphere and background noise.

Earth might seem special in this regard but water is actually fairly abundant in our system, and Jupiter’s icy moon Europa is quickly becoming a prime candidate in the search for life.

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 ...