Old NASA mission reveals an unlikely world harbors an ocean
Callisto, the third largest moon in the entire solar system, orbits Jupiter from about 1.2 million miles away. The rocky ...
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Ocean hidden under surface of distant planet's moon could host life
The presence of an ocean leaves open the possibility that it could host life. Another nearby moon, Europa, is also considered ...
Jupiter's moon Callisto is very likely an ocean world
More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, ...
7 stunning images of Moon captured by NASA
Earth's Moon: NASA's Galileo spacecraft took this image of Earth's Moon on Dec. 7, 1992, on its way to explore the Jupiter system in 1995-97. The Moon is Earth's only natural satellite.