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SOSIGENES

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Originally appearing in Volume V25, Page 435 of the 1911 Encyclopedia Britannica.
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SOSIGENES , See also:

Greek astronomer and mathematician, probably of See also:Alexandria, flourished in the 1st See also:century B.C. According to See also:Pliny (Nat. Hist. xviii. 25), he was employed by See also:Julius See also:Caesar in the reform of the See also:Roman See also:calendar (46 B.c.), and wrote three See also:treatises, which he conscientiously corrected. From another passage of Pliny (ii. 8) it is inferred that Sosigenes maintained the See also:doctrine of the See also:motion of See also:Mercury See also:round the See also:sun, which is referred to by his contemporary See also:Cicero, and was also held by the Egyptians. The astronomer is to be distinguished from the Peripatetic philosopher of the same name, who lived at the end of the 2nd century A.D. He was the See also:tutor of See also:Alexander of Aphrodisias, the most famous of the commentators on See also:Aristotle. He wrote a See also:work on Revolving See also:Spheres, from which some important extracts have been preserved iri See also:Simplicius's commentary on Aristotle's De caelo (the subject is fully discussed by T. H. See also:Martin, " Sur deux Sosigene," in Annales de la See also:lac. See also:des letires de See also:Bordeaux, i., 1879).

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