History of Ideas I

Events

Aristotle

Approx. 384 b.c.

Suggests that the Earth is at the centre of the Solar System

Aristarchus

310 BC

Suggests the Idea of the sun at the centre of the solar system

Ptolemy

150 BC

Suggests the idea of epicycles to suggest how planets move. The Earth is still at the centre of the Solar System

Nicolas Copernicus

1473

Suggests that the sun us at the centre of the Solar System

Galileo

1594 AD

Made major advances in telescope design.

Johannes Kepler

1600 AD

Suggests three laws of planetary motion and that orbits are ellipses and not circles

Isaac Newton

1700 AD

Suggested the idea of planetary gravity

William Herschel

1781 AD

Discovered Uranus

Edwin Hubble

1929 AD

Discovered that the universe is expanding