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.

If there was a contest for the most interesting moon in our solar system, Callisto would be a contender. Jupiter's second-largest moon has more impact craters on its surface than any other ...

In March and April 2025, internet users shared a striking image that they claimed showed "Steeple Mountain," a massive point of interest on Jupiter's moon Io. NASA Jet Propulsion Laboratory ...

Sampling the plumes of Jupiter's volcano moon, Io by Laurence Tognetti, Universe Today Image of plumes erupting from Io’s surface taken by NASA’s Galileo spacecraft in June 1997.

One of Jupiter's 95 known moons, Europa is almost the size of our own moon. It’s encased in an ice sheet estimated to be 10 miles to 15 miles or more (15 kilometers to 24 kilometers) thick.

That treat, a photo of the Jupiter moon Ganymede snapped on July 20, comes compliments of Juno's JIRAM, or Jovian Infrared Auroral Mapper. Jupiter's moon, Ganymede, captured by the Juno probe just ...

Canadian and other researchers have confirmed Saturn as the solar system’s undisputed “moon king,” after discovering 128 more moons circling the ringed planet. The discovery by a team ...