What is Io?
Q: What is Io?
A: Io is a moon of the planet Jupiter.
Q: How big is Io?
A: Io has a diameter of 3642 km, being slightly bigger than Earth's moon.
Q: How many active volcanos does Io have?
A: Io has about 400 active volcanos.
Q: Is Io the most volcanically active body in the Solar System?
A: Yes, Io is the most volcanically active body in the Solar System.
Q: How does Io's appearance constantly change?
A: Volcanoes erupt massive volumes of silicate lava, sulphur and sulphur dioxide, constantly changing Io's appearance.
Q: What is the new basemap of Jupiter's moon Io?
A: The new basemap of Jupiter's moon Io was produced by combining the best images from both the Voyager 1 and Galileo Missions.
Q: Why is Io a prolate spheroid?
A: Io is a prolate spheroid, pulled out of round by tidal stress from Jupiter’s gravity. Unlike most celestial bodies, Io has the same side always facing Jupiter because of the same tidal locking that makes the Moon have the same side always facing Earth.
