This view of Jupiter’s moon Io was captured by NASA’s Galileo spacecraft. Slightly larger than Earth’s moon, Io is the most volcanically active body in the solar system. Credit: NASA/JPL/University of.
Callisto - Fourth moon of Jupiter after Io - Europa - Ganymede. Formed of rock and ices Third largest moon in our solar system after Titan (Saturn) and Ganymede (Jupiter) respectively. Jupiter's Io being fourth and our Luna fifth.
Oct 2010 Io in True Color Credit: Galileo Project, JPL, NASA The strangest moon in the Solar System is bright yellow. Io's colors derive from sulfur and molten silicate rock. The unusual surface of Io is kept very young by its system of active volcanoes.
Jupiter Moons - Callisto discovered by Galileo Galilei in 1610 using a telescope. It is thought to have oceans of liquid water beneath its crust. about the size of Mercury, is the largest moon in the solar system. It is more heavily cratered than any