-
340 BCE
Aristotle
He was the first to say that the earth is in the centre of the solar system -
200 BCE
Aristarchus
He was the first to challenge Aristotle's theory, saying that the sun is in the centre -
150
Ptolemy
He made the idea of epicycles to show how the planets move (The earth is still in the centre) -
1543
Nicolas Copernicus
He was the second person to say that the sun was at the centre of the solar system -
Galileo Galilei
He was the inventor of the telescope. He also showed that Jupiter had moons -
Johannes Kepler
He made the 3 laws of planetary motion. He also introduced the idea of orbital planes being in ellipses(ovals) and not circles. -
Issac Newton
The man who discovered gravity. Later in his life,he made the 3 laws of physics that we use to this day. -
William Herschel
The man who discovered Uranus. -
Edwin Hubble
The man who discovered the fact that the universe is continually growing. He is also the man who created the Hubble telescope.