George William Hill
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Hill, George William
Born Mar. 3, 1838, in New York City; died Apr. 16, 1914, in West Nyack, N.Y. American astronomer and specialist in celestial mechanics.
Hill’s principal works were devoted to the theory of the motions of planets and asteroids, to general aspects of the theory of perturbations of celestial bodies, and to the precise determination of planetary mass. Data based on the theory of motion constructed by Hill for Jupiter and Saturn are still used in astronomical almanacs.