In the early seventeenth century, Copernicus' concept of a heliocentric universe was further ... "When I wrote my treatise about our system, I had my eye upon such principles as might work with ...

What if in fact the Sun is the centre of the solar system and all the planets, including the Earth, circle the Sun in orbits! My celestial model is called the Heliocentric planetary system.

The solar system is also home to many other cosmic ... This theory was known as the heliocentric model. It was controversial as accepted wisdom at the time (supported by the church) was that ...