Two new moons have been discovered orbiting Jupiter, bringing the total number of natural satellites orbiting the gas giant ...

The Moon and Jupiter share the morning sky as they rise together in Gemini the Twins. The pair is about 3° high in the ...

A long-standing mystery about the presence of hydrogen peroxide on Jupiter's icy ocean moon Europa may be closer to being solved.

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 ...

The rocky moon, which was first discovered by the ancient astronomer Galileo in 1610, is named for a mythological woman transformed into a cow during a marital dispute. More in Science ...

More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, Callisto, appears geologically unremarkable. In the 1990s, however, NASA's ...

For centuries after Galileo discovered Io and 1610, NASA said a first of its kind solar powered spacecraft called Juno on a five-year 1.7 billion mile journey to Jupiter and its moons to see what ...

The many discoveries of the Galileo spacecraft in its journey through space and around Jupiter will be explored at CU-Boulder’s Fiske Planetarium on Friday, Oct. 18, and Tuesday, Oct. 22, at … ...

In December 2000, when NASA’s Cassini spacecraft will pass by Jupiter, scientists from the Max Planck Institut f¸r Kernphysik in Heidelberg, Germany, will analyse microscopic ash particles from ...

Jupiter's second-largest moon has more impact craters on its surface than any other planetary body in the solar system, and it has tons of ice on its surface as well.

LOS ANGELES -- NASA's Galileo spacecraft was set to make its last flyby of one of Jupiter's moons early today, marking the likely end of the science-gathering part of its 13-year mission. Galileo ...

Galileo Galilei identified four of Jupiter's orbiting moons, examined Saturn, observed the varying phases of Venus, and scrutinized sunspots on the surface of the sun. (Hulton Archive/Getty Images) 4.