In great astronomers, robert stawell ball documents the developments in astronomy from the ancient period to the nineteenth century. he begins with a chapter on the life and works of ptolemy. which sentence in this excerpt from great astronomers shows that ptolemy’s theory was flawed, but that he was still the undisputed authority on astronomy for centuries?

"Though every child may now know more of the actual truths of the celestial motions than ever Ptolemy knew, yet the fact that his work exercised such an astonishing effect on the human intellect for some sixty generations, shows that it must have been an extraordinary production."

This would be the sentence in the excerpt from Great Astronomers that shows that Ptolomy's theory was flawed, but that he was still the undisputed authority on astronomy for centuries.