On 30 December 2023, the Juno spacecraft, exploring the Jovian system, approached the volcanic moon Io at a distance of just 1500 km (930 miles). A similar encounter is scheduled to take place on 3 February 2024. The probe is monitoring the moon's vo...

Europa is one of the four Galilean moons of Jupiter, and the second closest to the planet (after Io). Its surface is a shell of fractured ice but very few craters, as the latter are eradicated by surface movements of the ice almost as soon as they ar...

Europa is one of the four Galilean moons of Jupiter, and the second closest to the planet (after Io). Its surface is a shell of fractured ice but very few craters, as the latter are eradicated by surface movements of the ice almost as soon as they ar...

Europa is one of the four Galilean moons of Jupiter, and the second closest to the planet (after Io). Its surface is a shell of fractured ice but very few craters, as the latter are eradicated by surface movements of the ice almost as soon as they ar...

On 30 December 2023, the Juno spacecraft, exploring the Jovian system, approached the volcanic moon Io at a distance of just 1500 km (930 miles). A similar encounter is scheduled to take place on 3 February 2024. The probe is monitoring the moon's vo...

On 30 December 2023, the Juno spacecraft, exploring the Jovian system, approached the volcanic moon Io at a distance of just 1500 km (930 miles). A similar encounter is scheduled to take place on 3 February 2024. The probe is monitoring the moon's vo...

Illustration of Jupiter and two of its largest satellites, Europa (right) and Io (left, smaller). Europa is the smallest of the four Galilean moons of Jupiter, and the second closest to the planet. Its surface is icy and relatively smooth. Impacting ...