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

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 ...

By the 17th century, famed engineer and astronomer Galileo Galilei refined Copernicus' heliocentric model using observations made with telescopes he built himself. However, it was not until Kepler ...

Finding physical evidence that our planet revolves around the Sun took some clever thinking to prove that this heliocentric model of our solar system represents reality. The idea is ancient.