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Constantine I, Roman emperor
(Encyclopedia)Constantine I or Constantine the Great kŏnˈstəntēn, –tīn [key], 288?–337, Roman emperor, b. Naissus (present-day Niš, Serbia). He was the son of Constantius I and Helena and was named in ful...magnetism
(Encyclopedia) CE5 Lines of induction around a single bar magnet and between opposite poles of different magnets magnetism, force of attraction or repulsion between various substances, especially those made of i...stellar evolution
(Encyclopedia) CE5 The above Hertzsprung-Russell (H-R) diagram shows the track of stellar evolution for a typical star. After spending much of its life evolving toward or along the main sequence, the star becomes...physics
(Encyclopedia)physics, branch of science traditionally defined as the study of matter, energy, and the relation between them; it was called natural philosophy until the late 19th cent. and is still known by this na...Charles II, king of England, Scotland, and Ireland
(Encyclopedia)Charles II, 1630–85, king of England, Scotland, and Ireland (1660–85), eldest surviving son of Charles I and Henrietta Maria. Charles was a ruler of considerable political skill. His reign was m...Hudson's Bay Company
(Encyclopedia)Hudson's Bay Company, corporation chartered (1670) by Charles II of England for the purpose of trade and settlement in the Hudson Bay region of North America and for exploration toward the discovery o...Jesus, Society of
(Encyclopedia)Jesus, Society of, religious order of the Roman Catholic Church. Its members are called Jesuits. St. Ignatius of Loyola, its founder, named it Compañia de Jesús [Span.,=(military) company of Jesus];...quantum theory
(Encyclopedia)quantum theory, modern physical theory concerned with the emission and absorption of energy by matter and with the motion of material particles; the quantum theory and the theory of relativity togethe...press, freedom of the
(Encyclopedia)press, freedom of the, liberty to print or to otherwise disseminate information, as in print, by broadcasting, or through electronic media, without prior restraints such as licensing requirements or c...Frederick II, Holy Roman emperor and German king
(Encyclopedia)Frederick II, 1194–1250, Holy Roman emperor (1220–50) and German king (1212–20), king of Sicily (1197–1250), and king of Jerusalem (1229–50), son of Holy Roman Emperor Henry VI and of Consta...Browse by Subject
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