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Dione, in astronomy

(Encyclopedia)Dione dīōˈnē [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn IV (or S4), Dione is 695 mi (1,120 km) in diameter, orbits Saturn at a mean distanc...

Algol, in astronomy

(Encyclopedia)Algol ălˈgŏl [key], famous variable star in the constellation Perseus; Bayer designation β Persei; 1992 position R.A. 3h07.7m, Dec. +40°55′. Algol's variation in apparent magnitude, from 2.06 t...

restoration, in art

(Encyclopedia)restoration, in art: see art conservation and restoration. ...

horn, in music

(Encyclopedia)horn, in symphonic and chamber music: see French horn. ...

McLuhan, Marshall

(Encyclopedia)McLuhan, Marshall (Herbert Marshall McLuhan), 1911–80, Canadian communications theorist and educator, b. Edmonton, Alta. He taught at the Univ. of Toronto (1946–80) and at other institutions of hi...

Charon, in astronomy

(Encyclopedia)Charon, in astronomy, the natural satellite, or moon, of Pluto. ...

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