This setup provides an animated representation of the Ptolemaic system, placing a spherical Earth at the center of the universe. The model features a day-night cycle, an axis tilt, blinking stars, and a surrounding crystal sphere.

Two variations are included. The Vertical Dome version uses Geometry Nodes to animate the system from a top-down perspective, with spheres cyclically shifting to illustrate orbital tilt. The Rotating Spheres version features multi-axis rotation to emphasize the orbital structure. The animation serves as a stylistic illustration rather than a mathematically exact representation of Ptolemaic epicycles.