The presence of an ocean leaves open the possibility that it could host life. Another nearby moon, Europa, is also considered ...

Callisto, the third largest moon in the entire solar system, orbits Jupiter from about 1.2 million miles away. The rocky ...

More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, ...

Newly understood instrumentation readings returned in the 1990s from NASA’s Galileo spacecraft in orbit of Jupiter have revealed that the craft not only encountered but also flew through ejecta ...

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 ...

These are also the first findings on the gas giant 's abundance of water since NASA's 1995 Galileo mission suggested Jupiter might be extremely dry compared to the Sun. The comparison is based not ...