Similarly in astronomy, Aristotle used the assistance of Eudoxus and Callippus.
Eudoxus of Cnidus, a famous astronomer and physician of the 4th century B. C.
Eudoxus thought it was the good, his opinion being the weightier because of his temperateness.
Up to and including the theories of Eudoxus, physical and mathematical astronomy went hand in hand.
It seems therefore to date from about the time of Eudoxus, being then the oldest extant globe.
This is no more the case than that the spheres of Eudoxus and Callippus were supposed to be real.
Lastly, it was maintained by Eudoxus, one of the most estimable philosophers contemporary with Aristotle.
Among them was Eudoxus of Knidus, who afterwards became illustrious both in geometry and astronomy.
Pythagoras is said to have been the first to describe the earth as a sphere, and this view was adopted by Eudoxus and Aristotle.
Whether Eudoxus accompanied him there also, as Boeckh supposes, is doubtful: I think it improbable.