It took two centuries for the Copernican model to replaced the Ptolemaic model because. Physics & Astronomy

the Copernican model required complicated new terms to explain it correctly

the Church wouldn't let anyone talk about Copernicus' model for 200 years

in Copernicus' time, there were no telescopes

the Ptolemaic model was simpler and more aesthetically pleasing

there was no scientific evidence to support either model until Galileo made his observations