Massive volcanic features dot the surface of Io, one of the large moons of Jupiter, in this December 2023 view from the Juno spacecraft. Io is the most volcanically active body in the solar system, featuring several hundred erupting volcanoes and pools of magma, plus plains coated with sulfur. [NASA/SWRI/MSSS/Jason Perry]
Find out more in our radio program entitled Moon and Jupiter.