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 ...

What did they find on Ganymede? A composite image of Jupiter’s Galilean moons. From left to right: Io, Europa, Ganymede and Callisto.

None of Io's volcanoes are visible in amateur telescopes. At the current distance of 371 million miles (597 million km) it and the other bright Galilean moons — Callisto, Ganymede and Europa ...

In 2023, the European Space Agency will also launch its Jupiter Icy Moon Explorer (JUICE) mission to study Jupiter and three of its largest moons: Ganymede, Callisto and Europa.

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 ...

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 ...

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 ...