On this day in space! March 4, 1979: Voyager 1 performs flyby of Jupiter’s volcanic moon Io
On March 4, 1979, the Voyager 1 spacecraft made a flyby of Io, capturing stunning images of this moon of Jupiter. The detailed images of Io represented the first time that active volcanoes had been seen on the surface of another world. The images of Io helped scientists determine that Io is the most volcanic …