Jupiter's four best-known moons are the Galilean moons, discovered by Galileo ... and together, they make up around 99.97% of the mass of all the material orbiting the gas giant.

NASA Juno mission captured amazing new imagery of Jupiter's moon Europa. The spacecraft flew about 219 miles (352 kilometers) ...

Jupiter will appear brighter than most stars. With a telescope or a pair of binocular, you may be able to see one or two or its Galilean moons. Saturn, slightly less bright than Jupiter ...

There's a bright "star" shining in the east after dark. It's Jupiter, which is now approaching it's biggest, brightest and ...

Europa Clipper will peer beneath the moon’s icy crust where an ocean is thought to be sloshing fairly close to the surface ... of the four so-called Galilean moons of Jupiter, along with ...

Europa Clipper will peer beneath the moon's icy crust where an ocean is thought to be sloshing fairly close to the surface ... of the four so-called Galilean moons of Jupiter, along with Ganymede ...

of Jupiter on Oct. 23, during which the spacecraft traveled close to the planet's poles as well as near the world's fifth-largest moon, Amalthea. The raw photo data captured by the spacecraft's ...

Juno completed its 66th close flyby (also referred to as a perijove) of Jupiter on Oct. 23, during which the spacecraft traveled close to the planet's poles as well as near the world's fifth-largest ...