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magnetic resonance imaging
(Encyclopedia)magnetic resonance imaging (MRI), noninvasive diagnostic technique that uses nuclear magnetic resonance to produce cross-sectional images of organs and other internal body structures. The patient lies...virtual telescope
(Encyclopedia)virtual telescope, a computerized interferometer (see interference) that merges the images from two or more telescopes to obtain a single, large, enhanced image. The image in each telescope is made fr...SETI
(Encyclopedia)SETI sĕtˈē [key] [Search for ExtraTerrestrial Intelligence], name given to a series of independent programs to detect radio signals from civilizations beyond the solar system. Modern SETI efforts c...maser
(Encyclopedia)maser māˈzər [key], device for creation, amplification, and transmission of an intense, highly focused beam of high-frequency radio waves. The name maser is an acronym for microwave amplification b...Arecibo Observatory
(Encyclopedia)Arecibo Observatory, radio-astronomy facility located near Arecibo, Puerto Rico, part of the National Astronomy and Ionosphere Center. Conceived by, designed by, and built under the supervision of Wil...Wilson, Robert Woodrow
(Encyclopedia)Wilson, Robert Woodrow, 1936–, American radio astronomer, b. Houston, Tex., Ph.D. California Institute of Technology, 1962. In 1964 he and co-researcher Arno Penzias began monitoring radio waves in ...Doppler effect
(Encyclopedia)Doppler effect, change in the wavelength (or frequency) of energy in the form of waves, e.g., sound or light, as a result of motion of either the source or the receiver of the waves; the effect is nam...Branly, Édouard
(Encyclopedia)Branly, Édouard ādwärˈ bräNlēˈ [key], French physicist and physician. He was professor of physics at the Catholic Institute, Paris, from 1875. He developed (1890) a coherer for the detection of...Nuffield Radio Astronomy Laboratories
(Encyclopedia)Nuffield Radio Astronomy Laboratories: see Jodrell Bank Observatory. ...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...Browse by Subject
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