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tachometer

(Encyclopedia)tachometer tăkŏmˈətər [key], instrument that indicates the speed, usually in revolutions per minute, at which an engine shaft is rotating. Some tachometers, especially those used in automobiles, ...

Torrens, Sir Robert Richard

(Encyclopedia)Torrens, Sir Robert Richard tŏrˈənz [key], 1814–84, Australian statesman, b. Ireland. Son of Col. Robert Torrens (1780–1864), one of the founders of South Australia, he went to that colony in 1...

Altay

(Encyclopedia)Altay: see Altai, mountain system, Asia. ...

celestial equator

(Encyclopedia)celestial equator: see equatorial coordinate system. ...

encounter theory

(Encyclopedia)encounter theory, in astronomy, see solar system. ...

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