Jupiters 5th moon - Io
Facts about the moon Io. By: Bryce Knoll
Who discovered Io and when was it discovered?
The interior of Io is composed of an iron or sulfur or iron sulfide core.
The planets most destictive features are its volcanoes.
Aside from earth, Io is the only known body in the solar system to have observed active volcanoes.
NASA's voyager spacecraft discovered Io's volcanoes in 1979.
Io is the third largest of jupiters moons.
4.5 billion years ago, about as old as the same age of jupiters.