Scott Bolton’s first encounter with Io took place in the summer of 1980, right after he graduated from college and started a job at NASA. The Voyager 1 spacecraft had flown past this moon of Jupiter, ...

More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, Callisto, appears geologically unremarkable. In the 1990s, however ...

Sampling the plumes of Jupiter's volcano moon, Io by Laurence Tognetti, Universe Today Image of plumes erupting from Io’s surface taken by NASA’s Galileo spacecraft in June 1997.

In March and April 2025, internet users shared a striking image that they claimed showed "Steeple Mountain," a massive point of interest on Jupiter's moon Io. NASA Jet Propulsion Laboratory ...

Scientists on NASA's Juno mission to Jupiter have unveiled captivating aerial views of Jupiter's moon Io, showcasing two remarkable features: a towering mountain and a serene lake of cooling lava.