Size comparison between Earth's Moon and Jupiter's Galilean moons

EAS's Jupiter Icy Moons Explorer (Juice) will spend years in the Jovian system exploring the gas giant Jupiter, its space environment, and its intriguing satellites.

Juice will pay particular attention to Jupiter's 'Galilean Moons', Io, Europa, Ganymede, and Callisto, with special focus on the latter three. Their name comes from the Italian astronomer Galileo Galilei, who first observed these four moons through a telescope in 1610. But how do those moons compare to our own Moon? Whilst Io and Europa are relatively similar in size to the Moon, Juice's final destination Ganymede is quite a lot bigger.

Read more on what Juice will discover about the moons of Jupiter

[Image description: An infographic that displays Jupiter (diameter: 142 984 km) and its moons Io (3643 km), Europa (3122 km), Ganymede (5262 km) and Callisto (4821 km), together with Earth (12 756 km) and its Moon (3475 km).]