Christmas Eve is a good time for this experiment, as the two brightest moons are then well off to one side of Jupiter itself. Galileo was the first to describe the moons when he saw them through ...

One of Jupiter's four Galilean moons, Europa has long fascinated ... with the two innermost moons orbiting in the worst of it. While there is no avoiding this environment if one wants to study ...

Juno arrived at Jupiter in 2016 and has made over 60 orbits of the giant planet, but for the past few years it has been edging closer and making fly-bys of the large Galilean moons. On Dec. 30 ...

Galileo, who had observed Jupiter’s four major moons (now also called as the Galilean moons) on January 7, 1610 (Gregorian calendar), had already published Sidereus Nuncius (The Sidereal ...

In recent years, Saturn has overtaken Jupiter as the planet with the most satellites in our solar system. How many moons does ...

The Juno mission, which has been orbiting and observing Jupiter ... from previous missions that have flown by Jupiter and its moons, such as NASA’s Galileo spacecraft, as well as ground-based ...

But new measurements from Juno, coupled with archival data from the Galileo mission, have seemingly put to bed to the possibility of a magma ocean beneath the surface of Io. As many as 400 volcanoes ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: (left) NASA/JPL-Caltech/SwRI/MSSS Image processing by Emma Wälimäki; (inset) NASA ...