NASA's Europa Clipper spacecraft, launching in October 2024, will beat JUICE to Jupiter by about a year, arriving in orbit in April 2030, thanks to the power of its SpaceX Falcon Heavy rocket. But ...

Io, Europa, Ganymede and Callisto are, like Earth’s Moon, relatively large, spherical complex worlds. Two previous NASA missions have sent spacecraft to orbit the Jupiter system and collected ...

ESA's Mars Express orbiter captured footage of the Mars' moon Deimos pass in front of Ganymede, Europa, Jupiter, Io and ...

Assuming Io initially held some 20,000,000,000,000,000,000,000 (or 20 sextillion) tons of sulfur, the amount it’s lost so far leaves roughly 200 quintillion to 1.2 sextillion tons of sulfur ...

New research shows auroras can also be seen on the Galilean moons of Jupiter: hypervolcanic Io, icy Europa, quirky Callisto and gigantic Ganymede. Auroras exist throughout the cosmos, but often in ...

The other two large moons, Io and Callisto, aren’t subject to this phenomenon. The finding is interesting because both Europa and Ganymede — the largest moon in the solar system — have ...

Science has known that Jupiter has a quartet of moons since the days of Galileo. Those moons include Io, Europa, Ganymede, and Callisto. Each of the four moons is significantly different than the ...

Jupiter (right) and the Galilean satellites (right to left) Io, Europa, Ganymede, and Callisto. Cutaways show the interior states of Ganymede and Callisto after many impacts by icy planetesimals ...