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 ...

Europa Clipper - one of the most advanced spacecraft ever sent to another planet - aims to explore Jupiter's icy moon ...

You can see the planets here, orbiting the sun as ... people believed in a geocentric model of the solar system. Dallas explains the geocentric model and then the heliocentric model developed ...