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geology

(Encyclopedia)geology, science of the earth's history, composition, and structure, and the associated processes. It draws upon chemistry, biology, physics, astronomy, and mathematics (notably statistics) for suppor...

plate tectonics

(Encyclopedia)CE5 Plate tectonics: Map of the world showing major plates and plate boundaries CE5 Plate tectonics: Schematic model of the oceanic crust, showing the three types of plate boundaries plate tect...

galaxy

(Encyclopedia)CE5 Hubble classification of galaxies: Elliptical galaxies (E) are classified according to the degree of flattening of the ellipse. Spiral galaxies (S) and barred spiral galaxies (SB) are classifie...

black hole

(Encyclopedia)black hole, in astronomy, celestial object of such extremely intense gravity that it attracts everything near it and in some instances prevents everything, including light, from escaping. The term was...

light

(Encyclopedia)light, visible electromagnetic radiation. Of the entire electromagnetic spectrum, the human eye is sensitive to only a tiny part, the part that is called light. The wavelengths of visible light range ...

science

(Encyclopedia)science [Lat. scientia=knowledge]. For many the term science refers to the organized body of knowledge concerning the physical world, both animate and inanimate, but a proper definition would also hav...

Egyptian religion

(Encyclopedia)Egyptian religion, the religious beliefs of the ancient inhabitants of Egypt. Information concerning ancient Egyptian religion is abundant but unsatisfactory. Only certain parts of Egyptian religious ...

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...

satellite, artificial

(Encyclopedia)CE5 A. Nimbus weather satellite B. Syncom communications satellite satellite, artificial, object constructed by humans and placed in orbit around the earth or other celestial body (see also space ...

Prussia

(Encyclopedia)Prussia prŭshˈə [key], Ger. Preussen, former state, the largest and most important of the German states. Berlin was the capital. The chief member of the German Empire (1871–1918) and a state of t...