: In his only surviving work, On the Sizes and Distances of the Sun and Moon , he used geometry to estimate celestial dimensions.
: He calculated that the Sun was much larger than the Earth, suggesting its massive size made it a more natural center for the cosmos. aristarchus
While most of his writings are lost, his legacy is preserved through the works of others like Archimedes. : In his only surviving work, On the
: He theorized that the Sun and fixed stars remained stationary while the Earth rotated on its axis daily and revolved around the Sun annually. : In his only surviving work
: Like Anaxagoras before him, he suspected stars were other suns located at immense distances, explaining the lack of observable stellar parallax. Calculations vs. Reality