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

Europa is the sixth largest satellite in our Solar System and the smallest of Jupiter’s four Galilean moons. Discovered by ...

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

NASA’s Europa Clipper is using Mars and Earth’s gravity to travel efficiently to Jupiter. The spacecraft will study Europa’s ice and ocean.

If life exists deep within Europa, sunlight would be hard to come by. The moon’s icy shell is thought to be over six miles thick, with an ocean lying beneath that stretches over 60 miles into ...

Europa's frozen, fissured surface, seen here in a colorized mosaic image from the Galileo spacecraft, hides a liquid ocean that may hold all the ingredients needed for life. Three key ingredients ...

Europa. The name of Jupiter's icy moon has spread around the world as a hopeful candidate for life elsewhere in our solar system. If it's there, a new NASA-funded research alliance called Oceans ...

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

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Confirmation of Callisto's status as an ocean world would likely prompt further investigation into its potential to support life—just as the confirmation inspired research into Europa.