More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, Callisto, appears geologically unremarkable. In the 1990s, however, NASA's ...

Jupiter has 95 known moons and many moonlets, which are believed to have been created as the CPD coalesced and broke apart. But how that process came about and evolved is still mostly a mystery.

NASA officials said what Juno spotted was 'the most powerful volcanic event ever recorded on the most volcanic world in our solar system.' ...

NASA's Juno spacecraft made a close flyby of Jupiter moon lo. See an animation of the images the probe captured created by Koji Kuramura and Gerald Eichstädt. Credit: NASA/JPL-Caltech/SwRI/MSSS | ...

Skywatchers on Thursday evening, Feb. 6, will notice an eye-catching pairing-off between two of the brightest objects in the ...

The hellish surface of a moon of Jupiter known as Io is riddled with ... seen belching out eruptions six times the total energy of all the world’s power plants combined, NASA said in a press ...