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.

The European Space Agency is preparing a spacecraft to embark on an eight-year-long journey to Jupiter, where it will study the gas giant’s moons for ... complete at least four orbits of the ...