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.

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 ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Io is the most volcanic world in the solar system, with around 400 volcanoes. Its extreme ...

We already know a decent amount about how planets form, but moon formation is another process entirely, and one we're not as familiar with. Scientists think they understand how the most important moon ...