Copernican Room Showing Solar Systen Animated model of the solar system showing the sun in the center, and six of the nine known planets revolving around it. The planets also rotate on their axes as the real planets rotate, moving always at the correct relative speeds. Circling the Earth is a smaller globe, the moon, while Mars has two moons. Jupiter is shown with four of its twelve moons, and the Saturn with five of its nine. Aroung the walls are shown the twelve zodiacal constellations and in the center of the floor a reproduction of the Aztec Calendar Stone.