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radio telescope ![click to hear : radio telescope click to hear : radio telescope](../../images/speaker-vert.gif)
Instrument used to capture, concentrate and analyze radio waves emanating from a celestial body or a region of the celestial sphere.
steerable parabolic reflector ![click to hear : steerable parabolic reflector click to hear : steerable parabolic reflector](../../images/speaker-vert.gif)
Type of adjustable radio telescope in the shape of a saucer; its power depends on its diameter.
second focal room ![click to hear : second focal room click to hear : second focal room](../../images/speaker-vert.gif)
Secondary focus of the radio telescope that houses the radio receiver; used more often than the first focal room.
parabolic reflector ![click to hear : parabolic reflector click to hear : parabolic reflector](../../images/speaker-vert.gif)
A surface often composed of fine wire-mesh that collects radio waves and causes them to converge on a single point.
first focal room ![click to hear : first focal room click to hear : first focal room](../../images/speaker-vert.gif)
Observation capsule used on occasion; located in the prime focus of the radio telescope.
secondary reflector ![click to hear : secondary reflector click to hear : secondary reflector](../../images/speaker-vert.gif)
Receives waves reflected by the parabolic reflector and directs them toward the receiver.
laboratory ![click to hear : laboratory click to hear : laboratory](../../images/speaker-vert.gif)
Area where astronomers analyze the digital signal to obtain information.
rotating track ![click to hear : rotating track click to hear : rotating track](../../images/speaker-vert.gif)
Rail making it possible to turn the radio telescope vertically so as to point it toward a given region of the sky.
support structure ![click to hear : support structure click to hear : support structure](../../images/speaker-vert.gif)
Structural element on the rim that prevents the parabolic reflector from becoming deformed.
radio wave ![click to hear : radio wave click to hear : radio wave](../../images/speaker-vert.gif)
Invisible electromagnetic waves emitted by celestial bodies and collected on Earth using a radio telescope.
circular track ![click to hear : circular track click to hear : circular track](../../images/speaker-vert.gif)
Rail making it possible to turn the radio telescope horizontally so as to point it toward a given region of the sky.
elevator ![click to hear : elevator click to hear : elevator](../../images/speaker-vert.gif)
counterweight ![click to hear : counterweight click to hear : counterweight](../../images/speaker-vert.gif)
Weight equal to that of the parabolic reflector; makes it possible to balance the whole.
upper laboratory ![click to hear : upper laboratory click to hear : upper laboratory](../../images/speaker-vert.gif)
Area where the electrical signal is filtered, digitized and transmitted to the laboratory.
receiver ![click to hear : receiver click to hear : receiver](../../images/speaker-vert.gif)
Device that amplifies waves before they are converted into an electrical signal.