Suggests that the Earth is at the centre of the Solar System
Suggests the Idea of the sun at the centre of the solar system
Suggests the idea of epicycles to suggest how planets move. The Earth is still at the centre of the Solar System
Suggests that the sun us at the centre of the Solar System
Made major advances in telescope design.
Suggests three laws of planetary motion and that orbits are ellipses and not circles
Suggested the idea of planetary gravity
Discovered that the universe is expanding