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camouflage

(Encyclopedia)camouflage kămˈəfläzh [key], in warfare, the disguising of objects with artificial aids, especially for the purpose of making them blend into their surroundings or of deceiving the observer as to ...

space science

(Encyclopedia)space science, body of scientific knowledge as it relates to space exploration; it is sometimes also called astronautics. Space science draws on the conventional sciences of physics, chemistry, biolog...

digital radio

(Encyclopedia)digital radio, audio broadcasting in which an analog audio signal is converted into a digital signal before being transmitted; also known as digital audio broadcasting (DAB) and high-definition radio....

Lovell, Sir Bernard

(Encyclopedia)Lovell, Sir Bernard (Sir Alfred Charles Bernard Lovell), 1913–2012, English radio astronomer, b. Oldland Common, Gloucestershire, England, Ph.D. Univ. of Bristol, 1936. He was a member of the cosmic...

Comsat

(Encyclopedia)Comsat: see Communications Satellite Corporation; communications satellite. ...

Inmarsat

(Encyclopedia)Inmarsat: see Communications Satellite Corporation; communications satellite. ...

Intelsat

(Encyclopedia)Intelsat: see Communications Satellite Corporation; communications satellite. ...

Clarke, Arthur C.

(Encyclopedia)Clarke, Arthur C. (Sir Arthur Charles Clarke), 1917–2008, British science fiction writer. During World War II he served as a radar instructor and aviator in the Royal Air Force. After the war he obt...

geodesy

(Encyclopedia)geodesy jēŏdˈĭsē [key] or geodetic surveying, theory and practice of determining the position of points on the earth's surface and the dimensions of areas so large that the curvature of the earth...

Roche limit

(Encyclopedia)Roche limit, the closest distance that a celestial body held together only by its own gravity can come to a planet without being pulled apart by the planet's tidal (gravitational) force. This distance...