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radio telescope
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radio telescope


When radio telescopes can pick up light from distant galaxies billions of light-years away, they will be charting the universe as it looked in primeval times after the Big Bang.
Jostein Gaarder  --  Sophie’s World
  astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources
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radio telescope radio telescopes
Notes:
In contrast to an "ordinary" telescope, which produces visible light images, a radio telescope "sees" radio waves emitted by radio sources in space (such as individual stars, whole galaxies, & supernova remnants) typically by means of a large parabolic ("dish") antenna, or arrays of them.  You don’t look through a radio telescope; instead, the radio waves are collected, turned into electrical signals and then processed by computers. The end result is usually a picture: like a photograph, but made with radio waves instead of light.
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  • When radio telescopes can pick up light from distant galaxies billions of light-years away, they will be charting the universe as it looked in primeval times after the Big Bang.
    Jostein Gaarder  --  Sophie’s World
  • Salander sat there reading a book on the frequency calibration of radio telescopes in a weightless state.
    Stieg Larsson  --  The Girl Who Played with Fire
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Associated words [difficulty]:   radio telescope [9]
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Most commonly used in these subjects:   Science, Engineering
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