1PTOLEMAIC SOLAR SYSTEM: includes the “Sublunary Spheres” of Fire, Air, Water, and Earth, as well as the Crystalline Spheres and the Primum Mobile (First Mover) beyond the sphere of Fixed Stars.

This demo uses the rotation.css stylesheet to position the “fixed stars” around the solar system; no other elements require it.

1. Ptolemaic System • 2. “Egyptian” System • 3. Tychonic System • 4. Copernican System