The ocean on Ganymede may have more water than all the water on Earth. In this artist’s concept, the moon Ganymede orbits the giant planet Jupiter. NASA’s Hubble Space Telescope observed aurorae on ...

CAPE CANAVERAL, Fla. (AP) - NASA’s Juno spacecraft has provided the first close-ups of Jupiter’s largest moon in two decades. Juno zoomed past icy Ganymede on Monday, passing within 645 miles (1,038 ...

The predawn hours of Aug. 8 present a perfect opportunity to see Jupiter's four largest moons line up next to the "King of the Planets" as it voyages through the stars of the constellation Gemini.

The seven most marvellous moon images by NASA include Titan, Ganymede, Io, Mimas, Europa, Phobos, and Enceladus.

Large pieces of dark matter hitting Jupiter’s largest moon would form distinctive craters in its icy surface, and upcoming ...

Jupiter is the king of moons. With 95 of them orbiting the gas giant, some are so large they rival planets in size. But what ...

NASA’s Juno spacecraft has successfully found and characterised the auroral “footprints” of Jupiter’s moon Callisto for the first time. This discovery completes ...

Io, Europa and Ganymede had already shown their footprints through earlier observations. But Callisto, the farthest Galilean ...

A pair of astrophysicists with Aix- Marseille Université, CNRS, and Institut Universitaire de France have developed a new theory about the formation of Jupiter's largest moons. In their paper ...

NASA's Juno spacecraft has spied the final "auroral footprint" of a moon of Jupiter, meaning that it has watched as the moon ...