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Eudoxus of Cnidus

/juːˈdɒksəs; ˈnaɪdəs/
?406–?355 bc, Greek astronomer and mathematician; believed to have calculated the length of the solar year
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Eudoxus of Cnidus

Greek mathematician and astronomer who substantially advanced proportion theory, contributed to the identification of constellations and thus to the development of observational astronomy in the Greek world, and established the first sophisticated, geometrical model of celestial motion. He also wrote on geography and contributed to philosophical discussions in Plato's Academy. Although none of his writings survive, his contributions are known from many discussions throughout antiquity.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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