While the model seems outlandishly clunky to the modern mind, as Gingerich makes clear, the geocentric system of Ptolemy remained just as reliable a guide to predictions as Copernicus's new system ...

It has been suggested that Tūsī’s writings may have influenced Nicolaus Copernicus, as the latter astronomer would use arguments similar to Tūsī’s in his criticisms of Ptolemy.

Forget Darwin vs. Genesis--what about Ptolemy vs. Copernicus, or Egyptian vs. alien pyramid builders? As the folks over at the T-shirt site, Teach the Controversy explain: 'Big Science' is always ...

The Almagest (Ptolemy, 2nd Century AD), De revolutionibus (Copernicus, 1543) and Harmonices Mundi (Kepler 1619) will be on view Tuesday, January 22 thru Sunday, February 10, 2019.

Following Plato, Aristotle and Ptolemy, Copernicus held that the heavens were purer than the sublunary realm, and the contemplation of celestial beauty would lead us to virtue and to God.

During Copernicus’ time, astronomers accepted the theory which Ptolemy had formulated 1,400 years earlier. According to Ptolemy, the Earth was the center of the universe and had no motion.