All the planets are far too close together ... Before the 17th century most people believed in a geocentric model of the solar system. Dallas explains the geocentric model and then the ...

Much of medieval astronomy and geography were built on ... And his great contribution of the geocentric theory,” he adds, “was the true testament to Ptolemy’s greatness as an astronomer.” ...

contrary to the geocentric model favored by the Catholic Church, placed the Sun at the center of the cosmos. Despite facing backlash, Copernicus' work laid the foundation for modern astronomy ...