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rocket, in aeronautics

(Encyclopedia)CE5 Relative positions of the components of the Saturn V rocket, the U.S. space vehicle used in the moon missions rocket, any vehicle propelled by ejection of the gases produced by combustion of s...

Civil War, in U.S. history

(Encyclopedia)Civil War, in U.S. history, conflict (1861–65) between the Northern states (the Union) and the Southern states that seceded from the Union and formed the Confederacy. It is generally known in the So...

American Revolution

(Encyclopedia)American Revolution, 1775–83, struggle by which the Thirteen Colonies on the Atlantic seaboard of North America won independence from Great Britain and became the United States. It is also called th...

modern dance

(Encyclopedia)modern dance, serious theatrical dance forms that are distinct from both ballet and the show dancing of the musical comedy or variety stage. By the late 20th cent., distinctions among modern da...

mathematics

(Encyclopedia)mathematics, deductive study of numbers, geometry, and various abstract constructs, or structures; the latter often “abstract” the features common to several models derived from the empirical, or ...

chemistry

(Encyclopedia)chemistry, branch of science concerned with the properties, composition, and structure of substances and the changes they undergo when they combine or react under specified conditions. Organic chemi...

solar system

(Encyclopedia)CE5 Solar system CE5 solar system, the sun and the surrounding planets, natural satellites, dwarf planets, asteroids, meteoroids, and comets that are bound by its gravity. The sun is by far the ...

children's literature

(Encyclopedia)children's literature, writing whose primary audience is children. See also children's book illustration. The contributions and innovations of the 19th cent. continued into the 20th cent., achieving...

Ireland, Northern

(Encyclopedia)CE5 Ireland, Northern, division of the United Kingdom of Great Britain and Northern Ireland, 5,462 sq mi (14,147 sq km), NE Ireland. Made up of six o...

ballet

(Encyclopedia)CE5 The five classical positions in ballet ballet bălˈā, bălāˈ [key] [Ital. ballare=to dance], classic, formalized solo or ensemble dancing of a highly controlled, dramatic nature performed ...