At the same time the texts of ancient authors supplied hints which led to discoveries so far-reaching in their results as those of Copernicus, Columbus and Galileo.
He pointed out indeed that the so-called "third motion," introduced by Copernicus to account for the constant parallelism of the earth's axis, was a superfluous complication.
Further, Copernicus could not have known of Aristarchus's doctrine, since Archimedes's work was not published till after Copernicus's death.
The same arrangement was used by Copernicus, Tycho Brahe, by M.
Sometimes he misunderstood the astronomical science of the ancients, sometimes that of Copernicus and Tycho Brahe.