Galilean Moon Io
Io moon from Jupiter HD (NASA)
Jupiter's moon Io: A Volcanic Inferno
Io is Jupiter's third largest moon, and fifth one in distance of the planet. Io is constantly changing itself by volcanos, craters, lakes, lava flow, and smooth flood plans of liquid rock. It has no water unlike the other Jupiter moons.
Io was discovered January 8 1610 by Galileo Galilei. Io was the first moon to be discovered orbiting another planet besides earth.Io discovery was the reason people found out planets started orbiting the sun.