NASA's Juno spacecraft found Io’s surface is as smooth as glass, just like volcanically created obsidian glass ...

"These energized electrons then interact with Io's atmosphere and surface, ionizing and exciting atoms and molecules and even creating aurora." In the 1990s, NASA's Galileo mission discovered the ...

The surface of Io, one of Jupiter's many moons, is an especially hostile environment – even for space. Scientists recently observed its atmosphere completely collapse for the very first time.