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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...

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...

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...

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...

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...

Portland vase

(Encyclopedia)Portland vase, a Roman glass vase, known also as the Barberini vase. It is an unusually fine work of the late Augustan era (early 1st cent. b.c.). About 10 in. (25 cm) high and 22 in. (56 cm) in circu...

Old Sarum

(Encyclopedia)Old Sarum sârˈəm [key], site of a former city, Wiltshire, S England, just N of Salisbury (New Sarum). Excavations and scanning technologies have revealed remains of a British Iron Age fort, the Rom...

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...

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...