When it comes to volcanoes, Io is the place to be. This rocky moon of Jupiter is a touch bigger than Earth's moon but has an estimated four hundred active volcanoes! That's 1 volcano for every 40,000 or so square miles. Over the entire surface!
Image: NASA/JPL/U Of AZ
When it comes to volcanoes, Io is the place to be. This rocky moon of Jupiter is a touch bigger than Earth's moon but has an estimated four hundred active volcanoes! That's 1 volcano for every 40,000 or so square miles. Over the entire surface!
Image: NASA/JPL/U Of AZ