Before the 17th century most people believed in a geocentric model of the solar system. Dallas explains the geocentric model and then the heliocentric model developed by Kepler, Copernicus and ...

In 1508, Nicolaus Copernicus developed a celestial model of a heliocentric planetary system that transformed the way we view the universe. This bold theory, contrary to the geocentric ...

Far back in 1508, with only limited tools at his disposal, Nicolaus Copernicus developed a celestial model of a heliocentric planetary system, which he described in his landmark work De ...

Far back in 1508, with only limited tools at his disposal, Nicolaus Copernicus developed a celestial model of a heliocentric planetary system, which he described in his landmark work De ...