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ultraviolet astronomy

(Encyclopedia)ultraviolet astronomy, study of celestial objects by means of the ultraviolet radiation they emit, in the wavelength range from about 90 to about 350 nanometers. Ultraviolet (UV) line spectrum measure...

Quadruple Alliance

(Encyclopedia)Quadruple Alliance, any of several European alliances. The Quadruple Alliance of 1718 was formed by Great Britain, France, the Holy Roman emperor, and the Netherlands when Philip V of Spain, guided by...

Castlereagh, Robert Stewart, 2d Viscount

(Encyclopedia)Castlereagh, Robert Stewart, 2d Viscount kăˈsəlrā [key], 1769–1822, British statesman, b. Ireland. Entering the Irish Parliament in 1790 and the British Parliament in 1794, he was acting chief s...

bourgeoisie

(Encyclopedia)bourgeoisie bo͝orzhwäzēˈ [key], originally the name for the inhabitants of walled towns in medieval France; as artisans and craftsmen, the bourgeoisie occupied a socioeconomic position between the...

States-General

(Encyclopedia)States-General or Estates-General, diet or national assembly in which the chief estates (see estate) of a nation—usually clergy, nobles, and towns (or commons)—were represented as separate bodies....

Hapsburg

(Encyclopedia)Hapsburg or Habsburg both: hăpsˈbûrg, Ger. häpsˈbo͝ork [key], ruling house of Austria (1282–1918). In the 19th cent. the Hapsburg position was challenged in Germany by Prussia, in Italy b...

Frederick III, Holy Roman emperor and German king

(Encyclopedia)Frederick III, 1415–93, Holy Roman emperor (1452–93) and German king (1440–93). With his brother Albert VI he inherited the duchies of Styria, Carinthia, and Carniola. He became head of the hous...

flower

(Encyclopedia)CE5 Longitudinal cross section of a flower at the time of fertilization, showing a pollen grain and a pollen tube. flower, name for the specialized part of a plant containing the reproductive orga...

European Southern Observatory

(Encyclopedia)European Southern Observatory (ESO), an intergovernmental organization for astronomical research with headquarters in Garching, near Munich, Germany. The ESO began in 1962 as a consortium among Belgiu...

Penn, William, founder of Pennsylvania

(Encyclopedia)Penn, William, 1644–1718, English Quaker, founder of Pennsylvania, b. London, England; son of Sir William Penn. Penn became involved in the affairs of the American colonies when in 1675 he was ap...