> They correctly understood that heliocentrism predicted a parallax but failed to measure that with the primitive observational equipment they had. Aristotle i

> They correctly understood that heliocentrism predicted a parallax but failed to measure that with the primitive observational equipment they had. Aristotle in De Caelo (Book II, part 14): > The earth, then, also, whether it move about the centre or as stationary at it, must necessarily move with two motions. But if this were so, there would have to be passings and turnings of the fixed stars. Yet no such thing is observed. The same stars always rise and set in the same parts of the earth. * http://classics.mit.edu/Aristotle/heavens.2.ii.html http://classics.mit.edu/Aristotle/heavens.2.ii.html * https://en.wikipedia.org/wiki/On_the_Heavens https://en.wikipedia.org/wiki/On_the_Heavens See also: > In the mathēmatikoi tradition of Pythagoreanism the Earth was removed from the center of the universe. The mathēmatikoi believed that the Earth, along with other celestial bodies, orbited around a central fire. This, they believed, constituted a celestial harmony.[24] * https://en.wikipedia.org/wiki/Pythagoreanism#The_mathēmatikoi https://en.wikipedia.org/wiki/Pythagoreanism#The_mathēmatiko...