New research is revealing the secrets of Io, the mysterious volcanic moon of Jupiter. Four centuries after Galileo discovered Io in 1610, NASA sent a spacecraft called Juno on a five-year mission to Jupiter and its moons.

Since 2016, the NASA mission has captured some awe-inspiring views of alien worlds and promising venues for alien life.

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)

Giant lava lake found on Jupiter moon