Sky science
Radio Telescope
Direct answer
Radio Telescope: A Radio Telescope collects celestial radio waves with an antenna and receiver rather than forming an ordinary visible-light image.
It observes the universe at radio wavelengths.
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At a glance
- Found in
- Astronomy & Skywatching
- Related
- Reflecting Telescope, Catadioptric Telescope, Astronomical Spectroscopy, Solar Photosphere
It observes the universe at radio wavelengths.
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The story behind Radio Telescope
Twentieth-century radio astronomy opened an invisible sky and led to major discoveries.
A one-minute story
The Wandering Stars
How the moving planets were watched, named and found, and what a transit is.
Why Radio Telescope matters
Radio Telescope reveals cold gas, pulsars, molecules, jets, and structures hidden by dust.
How to read Radio Telescope
Interpret beam size, frequency band, calibration, and interference environment.
Radio Telescope in practice: an example
Multiple dishes can combine as an interferometer with kilometer-scale resolution baselines.
Where readings of Radio Telescope go wrong
A familiar dish photograph does not show the source’s true colors or visible appearance.
Sources and editorial method
Research references used for this entry include:
- European Southern Observatory: Technology for Telescopes - Observatory reference for aperture, angular resolution, atmospheric seeing, mirrors, and telescope technology.
- NASA Science: Universe Glossary - NASA definitions for common stellar, galactic, orbital, and high-energy astronomy terms.
- Source
- The Great Almanac Dictionary
- Category
- Astronomy & Skywatching
- Last updated
- 2026-09-26
Tune into the radio sky
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Common questions
What is a Radio Telescope?
A Radio Telescope collects celestial radio waves with an antenna and receiver rather than forming an ordinary visible-light image.
What do people get wrong about a Radio Telescope?
A familiar dish photograph does not show the source’s true colors or visible appearance.
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