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Compton effect

(Encyclopedia) Compton effect [for A. H. Compton], increase in the wavelengths of X rays and gamma rays when they collide with and are scattered from loosely bound electrons in matter. This effect…

Pandora, in astronomy

(Encyclopedia) PandoraPandorapăndôrˈə [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn XVII (or S17), Pandora is an irregularly shaped (nonspherical…

Rockefeller Center

(Encyclopedia) Rockefeller Center, complex of buildings in central Manhattan, New York City, between 48th and 51st streets and Fifth Ave. and the Ave. of the Americas (Sixth Ave.). The project was…

Orozco, José Clemente

(Encyclopedia) Orozco, José ClementeOrozco, José Clementehōsāˈ klāmānˈtā ōrōˈskō [key], 1883–1949, Mexican muralist, genre painter, and lithographer, grad. Mexican National Agricultural School. He…

Ulrich von Lichtenstein

(Encyclopedia) Ulrich von LichtensteinUlrich von Lichtenstein&oobreve;lˈrĭkh fən lĭkhˈtənshtīn [key], c.1200–1275, German minnesinger. His chief work, Frauendienst [service of his lady] (1255),…