Stunning new Jupiter photos from NASA’s Juno spacecraft reveal storms, cloud bands, and its volcanic moon Io as the mission ...

In January 1610, astronomer Galileo Galilei spotted what he thought were four small stars tagging along with Jupiter. These pinpricks of light are actually Jupiter's four largest moons ...

the prolific Italian astronomer Galileo Galilei discovered Jupiter's four largest moons: Ganymede, Io, Europa, and Callisto. This discovery unleashed a firestorm, with the Catholic Church placing ...

The moon was first discovered by Galileo Galilei in 1610 ... of tidal flexing—an energy-generating phenomenon caused by Jupiter's gravitational pull on Io as it orbits the gas giant.

Jupiter’s four largest moons – Io, Europa, Ganymede and Callisto – were the first ever discovered orbiting another planet. They were spotted by Galileo Galilei more than 400 years ago ...