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Le Châtelier's principle

(Encyclopedia)Le Châtelier's principle, chemical principle that states that if a system in equilibrium is disturbed by changes in determining factors, such as temperature, pressure, and concentration of components...

red shift

(Encyclopedia)red shift or redshift, in astronomy, the systematic displacement of individual lines in the spectrum of a celestial object toward the red, or longer wavelength, end of the visible spectrum. The effect...

symmetry

(Encyclopedia)symmetry, generally speaking, a balance or correspondence between various parts of an object; the term symmetry is used both in the arts and in the sciences. In art and design, it is often used in a s...

East African Community

(Encyclopedia)East African Community (EAC), organization of E African nations established to promote regional economic and political cooperation. Its headquarters are in Arusha, Tanzania. It was first founded in 19...

Dartmouth College Case

(Encyclopedia)Dartmouth College Case, decided by the U.S. Supreme Court in 1819. The legislature of New Hampshire, in 1816, without the consent of the college trustees, amended the charter of 1769 to make Dartmouth...

Fert, Albert

(Encyclopedia)Fert, Albert älbârˈ fâr [key], 1938– French physicist, b. Carcassonne, France. After receiving his Ph.D. at the Univ. of Paris-Sud in 1970 Fert accepted a teaching position there and headed a re...

Huggins, Sir William

(Encyclopedia)Huggins, Sir William, 1824–1910, English astronomer. Using a spectroscope, he began to study the chemical constitution of stars from the observatory attached to his home in Tulse Hill, London. He pr...

Frasconi, Antonio

(Encyclopedia)Frasconi, Antonio äntōˈnyō fräskōˈnē [key], 1919–2013, American graphic artist, b. Buenos Aires. His family moved to Uruguay weeks after his birth. Frasconi immigrated to the United States i...

Guchkov, Aleksandr Ivanovich

(Encyclopedia)Guchkov, Aleksandr Ivanovich əlyĭksänˈdər ēväˈnəvĭch go͝ochˈkôf [key], 1862–1936, Russian political leader. A prominent businessman, during the 1905 revolution he helped found the Octob...

Jenkins's Ear, War of

(Encyclopedia)Jenkins's Ear, War of, 1739–41, struggle between England and Spain. It grew out of the commercial rivalry of the two powers and led to involvement in the larger War of the Austrian Succession. The i...