Jupiter's moon Ganymede is virtually a planet in its own right. Not only is this distant world the largest of the solar system's moons, but it's also even larger than the planet Mercury.

"There's much more water than we thought 20 or 30 years ago, and it's really interesting to use this technique to try to ...

You can see the four major Galilean moons with your binoculars! The four major moons of Jupiter are Io, Europa, Callisto, and ...

Flybys of Jupiter’s moon Io, the only known volcanic world in our solar system, have captured images of a massive lava lake ...

Io is the most volcanic body known to science, and researchers have puzzled over its history for years. A new report suggests ...

NASA's Juno spacecraft has been investigating Jupiter's moon Io, the most volcanically active body in the solar system, and ...

Can tidal forces cause an exoplanet's surface to radiate heat? This is what a study accepted to the Astronomical Journal ...

Michelangelo announced his love for a young upper-class gentleman in verse and prose, but he also gave Tommaso de’ Cavalieri ...

Since 2016, the NASA mission has captured some awe-inspiring views of alien worlds and promising venues for alien life.

Finding water on distant planets and moons in our solar system is a challenge, especially when the instrument is thousands of ...

Jupiter's moon Io is the solar system's most volcanic body thanks to a gravitational tug of war that rages below its surface.

From the imagery and data, scientists were able to make the first up-close observations of the northern latitudes of Io, as ...