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magnitude

(Encyclopedia)magnitude, in astronomy, measure of the brightness of a star or other celestial object. The stars cataloged by Ptolemy (2d cent. a.d.), all visible with the unaided eye, were ranked on a brightness sc...

Amman

(Encyclopedia)Amman ämänˈ [key], city (1997 est. pop. 1,415,000), capital of Jordan, N central Jordan, on the Jabbok (Wadi Zerka) River. Jordan's largest city and industrial and commercial heart, it is also a tr...

Saxons

(Encyclopedia)Saxons, Germanic people, first mentioned in the 2d cent. by Ptolemy as inhabiting the southern part of the Cimbric Peninsula (S Jutland). Holding the area at the mouth of the Elbe River and some of th...

Francis I, king of France

(Encyclopedia)Francis I, 1494–1547, king of France (1515–47), known as Francis of Angoulême before he succeeded his cousin and father-in-law, King Louis XII. The king also had some notable political achievem...

hemophilia

(Encyclopedia)hemophilia hēˌməfĭlˈēə, –fēlˈyə [key], genetic disease in which the clotting ability of the blood is impaired and excessive bleeding results. The disease is transmitted through females but...

John of Procida

(Encyclopedia)John of Procida prōˈchēdä [key], c.1225–c.1302, Italian conspirator, lord of the island of Procida. He was an ardent supporter of the Hohenstaufen cause in Sicily and attempted to secure the isl...

Anne of Cleves

(Encyclopedia)Anne of Cleves klēvz [key], 1515–57, fourth queen consort of Henry VIII of England. The sister of William, duke of Cleves, one of the most powerful of the German Protestant princes, she was conside...

Frederick II, king of Sicily

(Encyclopedia)Frederick II, 1272–1337, king of Sicily (1296–1337), 3d son of Peter III of Aragón. When his brother, who was king of Sicily, became (1291) king of Aragón as James II, Frederick was his regent i...

Fernández de Córdoba, Gonzalo

(Encyclopedia)Fernández de Córdoba, Gonzalo fārnänˈdāth dā kōrˈdōbä [key], 1453–1515, Spanish general, called the Great Captain. He fought in the civil wars preceding and following the accession of Is...

Pembroke, William Marshal, 1st earl of

(Encyclopedia)Pembroke, William Marshal, 1st earl of, d. 1219, English nobleman. He became (1170) a guardian of Prince Henry, eldest son of Henry II, and supported him in his abortive rebellion (1173–74) against ...