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 ...

This article lists the top 7 largest moons in our Solar System, detailing their size, the planet they orbit, and key ...

Turn a telescope to the eastern sky in the hours following midnight on Nov. 5 to see two colossal shadows darken the cloud ...

NASA’s Juno spacecraft flew closer to Jupiter’s moon Ganymede than any spacecraft in the last two decades, according to NASA. The moon is the largest in our solar system. (FILE-A screenshot from the ...

Jupiter’s moon Io has revealed a breathtaking spectacle through the lens of the James Webb Space Telescope (JWST).

On the early hours of November 5, Jupiter's moons Io and Europa will cast their shadows over the planet's cloud surface, visible through a telescope.

Our solar system’s largest moon, Ganymede of Jupiter, has never been completely mapped — until now. Scientists led by Wheaton College’s Geoffrey Collins combined data from NASA’s Voyager 1, 2 and ...

When searching for the unknown, classic physics wisdom holds that a bigger detector boosts the chances of discovery. A physicist is taking that advice to heart, advancing a bold plan to use none other ...

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.