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.

When Nasa's Juno probe approached Jupiter it caught sight of its four big moons - Callisto, Ganymede, Europa and Io. When Galileo Galilei's discovered these moons in 1610, it marked the birth of ...

The discovery has raised a lot of questions. How do you spot moons, and why hadn’t anybody seen these ones already? Doesn’t Jupiter have the most moons? What are they going to call all these ...

"We've known for a while that objects the size of Jupiter ... with orbital periods ranging from 0.67 days (TOI-2109 b) to 3.03 days (TrES-1 b) with the goal of ascertaining their orbital period ...

If you buy through a BGR link, we may earn an affiliate commission, helping support our expert product labs. The European Space Agency is preparing a spacecraft to embark on an eight-year-long ...

These regular gravitational tugs can be amplified by orbital resonances—a configuration where each moon's period around a planet is an exact integer of the others' periods. Jupiter's moons Io ...

(CNN) --The Galileo spacecraft resumed normal operations on Friday, the day after it unexpectedly shut down while darting dangerously close to Jupiter and its most volatile moon. The aging robot ...

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 ...