Changing of Constellations

All stars are projected onto the Firmament by the stationary Celestial Sphere, and dragged from east to west by the Leaders of the Stars or "Heads Over Thousands".

The Celestial Sphere is divided into twelve sections; each section has one particular constellation.

In the course of the year, the sphere makes one revolution around the illustrated axis of rotation, whereas the area below the red line is projected onto the firmament and the area above the red line is not - this brings about the changing of constellations we observe.