Juno reveals 'smooth as glass' lava lake on Jupiter's moon, Io
An image of Jupiter's moon Io, captured during the Juno spacecraft's 57th flyby of Jupiter, in December 2023, captured an amazing look at Loki Patera, an immense volcanic lake in the moon's northern hemisphere. (NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill)