Seleucus of Seleucia was an ancient astronomer who defended heliocentrism, arguing that Earth orbits the Sun and rotates on ...

This theory was known as the heliocentric model. It was controversial as accepted wisdom at the time (supported by the church) was that Earth was at the centre of the universe. Create your own ...

It discusses how early thinkers like the Egyptians and Greeks perceived the cosmos, leading to the heliocentric model proposed by Copernicus and refined by Kepler. Galileo's experiments laid the ...

DALLASIt's only when the big guns Copernicus, Galileo and Kepler came along that our understanding shifted to a heliocentric model with the sun at the centre of things and the Earth, and the other ...