NASA scientists have sought to understand planet Jupiter, the gas giant whose mass is more than the rest of the planets in ...

Jupiter’s moon Callisto passes near the planet’s northern limb, shortly before Io transits and Ganymede emerges from the gas ...

And thus, Io, Europa and Ganymede became known as the Galilean moons of Jupiter. Learn more about NASA’s current mission to Europa here. Multimedia editor Rob Landers wrote and verified this ...

Sunrise: 6:56 A.M. Sunset: 9:17 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 ...

"Rings are mostly made of ice and small rocks," said William Saunders, a planetary scientist at NASA's Langley Research ...

Jupiter’s opposition occurs every 13 months ... and three or four of the Galilean satellites (moons) should be visible,” said Adam Kobelski, a research astrophysicist at NASA’s Marshall ...

On the fiery Io, the innermost and third-largest of Jupiter’s four Galilean moons, Juno's observations have provided more insights about its incessant volcanic activity. It's a world home to ...