Eudoxus of Cnidus, in the fifth century B.C., is said by his commentator Aratus to have also believed in the solidity of the heavens, but his reasons are.!
Quite different things in this respect are reported by Agatharchides of.Eudoxus of Cnidus
(b. Cnidus, ca. 400 b.c.; d. Cnidus, ca.
Eudoxus, a native of Cnidus, who lived about the fourth century B.C., a contemporary of Plato, was the first Greek who described the constellations.
347 b.c.)
astronomy, mathematics.
A scholar and scientist of great eminence, Eudoxus, son of a certain Aischines, contributed to the development of astronomy, mathematics, geography, and philosophy, as well as providing his native city with laws.
As a young man he studied geometry with Archytas of Tarentum, from whom he may well have taken his interest in number theory and music; in medicine he was instructed by the physician Philiston; and his philosophical inquiries were stimulated by Plato, whose lectures he attended as an impecunious student during his first visit to Athens.
Later his friends in Cnidus paid for a visit to Egypt, where he seems to have had diplomatic dealings with King Nekhtanibef II on behalf of Agesilaus II of Sparta.
Eudoxus spent more than a year in Egypt, some of the time in the company of the priests at Heliopolis.
He was said to have composed his Oktaeteris, or eight-year calendric c