This mission will spend several years studying the icy Galilean moons Europa, Callisto, and Ganymede in an attempt to better understand their formation, structure, and evolution.

The moons of Jupiter. As mentioned last week, current count has them at 79, though only 53 have been officially named. The majority of these moons are fairly tiny, which is why it’s difficult to ...

67 moons orbit the great gas giant Jupiter; of these, the four largest are known as the Galilean moons, having been discovered by Galileo Galilei using his telescope in 1610. The four moons are Io ...

Planetary, moon and asteroid science. Galileo itself reached Jupiter on Dec. 7, 1995, beginning its years of circling the planet and its moons.

Jupiter’s Galilean Moons Shine In The Sky Tomorrow Night. Alexandra Lozovschi. Updated September 1, 2018 at 1:43 PM. Link Copied. Venus, the moon, Jupiter, and two Galilean moons.

The two Galilean moons of Io and Europa (left to right) can also be seen. (CORBIS/Corbis via Getty Images) On Jan. 7, 1610, Galileo discovered four moons revolving around Jupiter — a discovery ...

Galileo realized that since the moons of Jupiter obeyed Kepler's laws, they could serve as a kind of heavenly clock. A clock more precise than any human-made clock of the time.

On this date, Jan. 7, 1610, astronomer Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant stars, Galileo’s repeated ...

Jupiter presented a stunning gift last weekend, at least to those who had a clear view from Earth. On Aug. 15, Jupiter’s largest moons, known as the Galilean moons, aligned to give two stunning ...

More than 400 years after Galileo Galilei discovered the first of Jupiter's moons, astronomers have found a dozen more — including one they've dubbed "oddball" — orbiting the planet. That ...

The moons of Jupiter. As mentioned last week, current count has them at 79, though only 53 have been officially named. The majority of these moons are fairly tiny, which is why it’s difficult to ...