radio telescopes

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• List of radio telescopes — This is a list of radio telescopes that are or have been used for radio astronomy. It includes both single dishes and interferometric arrays. They are listed by region, then by name; unnamed telescopes are in reverse size order at the end of the… …   Wikipedia

• Some important radio telescopes — ▪ Table Some important radio telescopes name diameter of dish (metres) short wavelength limit (cm) location Filled aperture telescopes Arecibo Observatory 305 6 Arecibo, P.R. Green Bank Telescope 110 x 100 0.3 Green Bank, W.Va., U.S. Effelsberg… …   Universalium

• Radio astronomy — is a subfield of astronomy that studies celestial objects at radio frequencies. The field originated from the discovery that many astronomical objects emit radiation in the radio wavelengths as well as optical ones. The great advances in radio… …   Wikipedia

• Radio art — refers to the use of radio for art. Radio Art implies that the artist who works in, and with, radio is not necessarily a trained DJ, programmer, producer, engineer, or personality, but one who uses sound to make art and seeks ways to transit it… …   Wikipedia

• radio telescope — radio telescopes N COUNT A radio telescope is an instrument that receives radio waves from space and finds the position of stars and other objects in space …   English dictionary

• Radio telescope — A radio telescope is a form of directional radio antenna used in radio astronomy and in tracking and collecting data from satellites and space probes. In their astronomical role they differ from optical telescopes in that they operate in the… …   Wikipedia

• Télescopes spatiaux — Télescope spatial Le télescope spatial Hubble en orbite autour de la Terre. Un télescope spatial est un télescope placé au delà de l atmosphère. Le télescope spatial présente l avantage par rapport à son homologue terrestre de ne pas être… …   Wikipédia en Français

• radio telescope — Astron. a system consisting of an antenna, either parabolic or dipolar, used to gather radio waves emitted by celestial sources and bring them to a receiver placed in the focus. [1925 30] * * * Combination of radio receiver and antenna, used for… …   Universalium

• radio and radar astronomy — Study of celestial bodies by measuring the energy they emit or reflect at radio wavelengths. It began in 1931 with Karl Jansky s discovery of radio waves from an extraterrestrial source. After 1945, huge dish antennas, improved receivers and data …   Universalium

• radio star — noun : a radio source of very small dimensions and relatively strong radiation and sometimes identified with certain small nebulosities and galaxies * * * Astron. Now Rare. a radio source. [1945 50] * * * radio star noun A discrete source of… …   Useful english dictionary

• radio emission — noun an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m (Freq. 16) • Syn: ↑radio wave, ↑radio radiation • Hypernyms: ↑electromagnetic radiation, ↑electromagnetic wave, ↑nonparticulate radiation …   Useful english dictionary