- The Greek astronomer Ptolemy explained how the Sun, the Moon and the Planets moved in orbits.
- His idea said the Earth was the centre of everything, this is a geocentric model.
- The Polish astronomer Nicolaus Copermicus thought that Ptolemy was wrong, he thought the sun was the centre of the solar system, this is a heliocentric model.
- The telescope allowed scientists to see objects in greater detail than with the naked eye.
- Galileo Galilei saw moons orbiting Jupiter, he supported…