Eudoxus of Cnidus
Eudoxus of Cnidus (; , "Eúdoxos ho Knídios"; ) was an ancient Greek astronomer, mathematician, scholar, and student of Archytas and Plato. All of his works are lost, though some fragments are preserved in Hipparchus' commentary on Aratus's poem on astronomy. "Sphaerics" by Theodosius of Bithynia may be based on a work by Eudoxus.