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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…Fred Lawrence Whipple Observatory
(Encyclopedia) Fred Lawrence Whipple Observatory, astronomical observatory located 35 mi (56 km) S of Tucson, Ariz., at an altitude of 8,500 ft (2,590 m). It is operated jointly by the Smithsonian…Hassel, Odd
(Encyclopedia) Hassel, OddHassel, Oddôd häsˈəl [key], 1897–1981, Norwegian chemist, b. Christiania (now Oslo), grad. Oslo Univ. (1920), Ph.D. Univ. of Berlin (1924). After pursuing X-ray…Delany, Samuel R.
(Encyclopedia) Delany, Samuel R. (Samuel Ray Delany, Jr.), 1942–, African-American wrtier, b. Harlem, New York City. Delany uses science fiction, fantasy, and memoir to explore sexual identity, race…Cushing, Harvey Williams
(Encyclopedia) Cushing, Harvey Williams, 1869–1939, American neurosurgeon, b. Cleveland, B.A. Yale, 1891, M.D. Harvard, 1895. Associated with Johns Hopkins (1896–1912), Harvard (1912–32), and Yale (…King, Coretta Scott
(Encyclopedia) King, Coretta Scott, 1927–2006, American civil-rights leader, b. Heiberger, Ala.; the wife (1953–68) of Martin Luther King, Jr. After her husband's assassination, she carried on his…Dodd, William Edward
(Encyclopedia) Dodd, William Edward, 1869–1940, American historian and diplomat, b. Clayton, N.C. He was professor of history at Randolph-Macon College (1900–1908) and at the Univ. of Chicago (1908–…Scorpius
(Encyclopedia) ScorpiusScorpiusskôrˈpēəs [key] or ScorpioScorpius–pēō [key] [Lat.,=the scorpion], conspicuous southern constellation lying on the ecliptic (the sun's apparent path through the heavens…Fribourg
(Encyclopedia) Fribourg Fribourg frīˈbûrg, Fr. frēb&oomacr;rˈ [key], Ger. Freiburg, canton , 645 sq mi (1,671 sq…antipope
(Encyclopedia) antipope [Lat.,=against the pope], person elected pope whose election was declared uncanonical and in opposition to a canonically chosen pontiff. Important antipopes were Novatian;…