Io, the innermost of Jupiter’s four Galilean moons, is the most volcanic world in the solar system, giving it a dynamic mix of yellows, reds, and browns. Hyperion is one of the strangest moons ...

Saturn, Jupiter’s outer neighbour, currently has 83 known satellites. The four larger moons mentioned above, also known as the 'Galilean moons', account for 99.997 percent of the total mass of Jupiter ...

The body in question is not Mars but Europa, one of the four moons of Jupiter first ... Even more exciting is the Jovian moon Io, the Galilean moon closest to the giant planet.

Saturn's moons are much smaller than Jupiter's four large moons: Ganymede (the largest satellite in the Solar System), Callisto, Io and Europa, known collectively as the 'Galilean' moons after the ...

Sunrise: 6:56 A.M. Sunset: 7:17 P.M. Moonrise: 4:25 A.M. Moonset: 1:42 P.M. Today starts a run of events taking place around mighty Jupiter, as its Galilean moons show off while they dance in ...

A student Odyssey at Libby Center in Spokane has been named as a finalist in NASA's Power to Explore Challenge.