The Cosmos Is Made Up of the Four Elements

Aristotle describes the cosmos as spherical in form, made up of many nested spheres. Hedge is the outermost sphere, in which are embedded the so called fixed stars. Our lower realm is beneath these heavenly spheres, at the centre of the cosmos. It would seem that the celestial motion is somehow responsible for the mixture of these elements. The word planet comes from the greek verb meaning to wander.