article: Callisto (moon)
links: Galileo (spacecraft) Pioneer 10 Europa (moon) Earth Pioneer 11 Moon Planetary core Galileo Galilei Ganymede (moon) Cassini−Huygens Satellite (natural) Sublimation (phase transition) Galilean moons Jupiter Opposition (astronomy) Pascal (unit) Solar System Io (moon) Jupiter (planet) Kallisto Mercury (planet)