Jupiter’s moon Io from Juno close flyby

Jupiter's turbulent moon, Io, captured during a close approach by NASA's Juno spacecraft on Dec. 30, 2023. Juno's flyby was the closest of any spacecraft since the Galileo orbiter's visit two decades earlier, and brought Juno within about 930 miles (1,500 kilometers) of Io, the most volcanic world in our solar system. This image was compiled from JunoCam's red, blue, and green filters, from an altitude of 1,764 miles (about 2,840 km), during Juno's 57th orbit around Jupiter.