Io, first discovered by Galileo Galilei in 1610 ... else in the solar system. The rocky moon’s surface is covered with hundreds of volcanoes, drawing comparisons to the fictional volcanic ...

If there was a contest for the most interesting moon in our solar system ... methods on 30-year-old measurements taken by NASA's Galileo mission. That mission launched in 1989 and scanned Jupiter ...

Io, first discovered by Galileo Galilei in 1610 ... else in the solar system. The rocky moon's surface is covered with hundreds of volcanoes, drawing comparisons to the fictional volcanic planet ...