According to the Ptolemaic idea, the earth was the heart of the universe. The geocentric or Milky way-centered system is also called the Ptolemaic system. The Ptolemaic ideal has outstanding movement.
In the epicycles were orbited inside planets used for a world-centric model of the world to clarify inconsistencies among predicted.
It observable planet motion, like the presence of worlds slowing, accelerating, and going backward.
