Earlier this week, Saturn gained a whopping 128 new official moons, as the International Astronomical Union recognised ...

Jupiter has four large moons – Io, Europa, Ganymede and Callisto – with diameters of more than 3000 kilometres. However, as of April 2023, we know it is also home to 91 additional small satellites.

These pinpricks of light are actually Jupiter's four largest moons, now known as the Galilean moons: Io, Europa, Ganymede, and Callisto. Many of these celestial orbs are as remarkable as Jupiter ...

The most volcanic body in the solar system, Io is an infernal hellworld that constantly spits sulfurous magma into space. And a new study suggests that it's been that way for a long, long time.

Europa is the sixth largest satellite in our Solar System and the smallest of Jupiter’s four Galilean moons. Discovered by Galileo Galilei in 1610, Europa has a smooth, icy surface crisscrossed by a ...

When it comes to places to search for life, Io hasn’t really been at the top of the list. Other moons of Jupiter, like Europa and Ganymede, have been considered far more likely candidates.

If you find Jupiter, you’ll likely see four ... Discovered by Galileo Galilei in 1610, Io, Callisto, Europa and Ganymede are proving to be fascinating topics of study for modern day astronomers.

Callisto lies much farther east, and Io sits alone to Jupiter’s west. By midnight in the Central time zone, Europa has pulled ahead and is just slipping in front of the jovian disk. Ganymede ...

The shadows of Ganymede and Europa cross the face of Jupiter together March 11/12. At the time shown here, Io has just emerged from eclipse within Jupiter’s shadow; Callisto lies farther east.

Saturn surpasses Jupiter with 128 newly discovered moons, becoming the planet with the most moons in our solar system.