The Heavens

Book 1 of The Heavens by Aristotle Simplified

The Dimensions of the Heavens

The Heavens are Eternal

Circular motion

The Heaven is a Sphere

Moving along a circle

The Harmony of Stellar Movement is False

The Relative Movement of the Stars and the Heavens

The Spheres

The Spheres

The Position and Shape of the Earth

The Position and Shape of the Earth

The Vortex Theory of Empedocles (from Anaximander)