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Arecibo Observatory
(Encyclopedia)Arecibo Observatory, radio-astronomy facility located near Arecibo, Puerto Rico, part of the National Astronomy and Ionosphere Center. Conceived by, designed by, and built under the supervision of Wil...Ritchey, George Willis
(Encyclopedia)Ritchey, George Willis, 1864–1945, American astronomer, b. Meigs co., Ohio, studied at the Univ. of Cincinnati (1883–84, 1886–87). He was superintendent of instrument construction (1899–1904) ...reflector
(Encyclopedia)reflector: see telescope.refractor
(Encyclopedia)refractor: see telescope.Coudé focus
(Encyclopedia)Coudé focus: see telescope.equatorial mounting
(Encyclopedia)equatorial mounting: see telescope. ...Newtonian focus
(Encyclopedia)Newtonian focus: see telescope.Cassegrain focus
(Encyclopedia)Cassegrain focus: see telescope. ...resolving power
(Encyclopedia)resolving power: see telescope.Pulkovo
(Encyclopedia)Pulkovo po͞olˈkəvə [key], astronomical observatory, S of St. Petersburg, NW Russia. Pulkovo was built (1834–39) under a commission headed by F. G. W. von Struve. In 1839 its 15-in. (38-cm) refra...Browse by Subject
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