radio telescope

American  

noun

Astronomy.

1. 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.

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radio telescope British  

noun

1. an instrument consisting of an antenna or system of antennas connected to one or more radio receivers, used in radio astronomy to detect and analyse radio waves from space

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radio telescope Scientific  

1. An instrument that consists of a radio receiver and antenna system mounted on a wide, bowl-shaped reflector, used to detect radio-frequency emissions from astronomical objects. The reflector and receiver form a parabolic antenna; incoming radio waves are focused by the reflector onto the receiver, where the radio signals are translated into electrical signals for further processing or electronic display. Due to the long wavelengths of radio waves, the reflectors of radio telescopes must be very large to focus the waves at a good resolution. Separate reflectors are sometimes linked in fixed arrays to act as a single collector.

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Etymology

Origin of radio telescope

First recorded in 1925–30

Example Sentences

See Examples For:

radio telescope

Argentina’s recent decision to pause a joint Chinese effort to construct a large radio telescope is a hopeful sign.

From The Wall Street Journal ● Mar. 13, 2026

The research team used data from South Africa's MeerKAT radio telescope, one of the most powerful radio observatories in the world, made up of 64 interconnected dishes.

From Science Daily ● Dec. 25, 2025

The desert's extreme aridity makes it one of the clearest places on Earth to view the night sky and is famous for being home to the largest radio telescope in the world.

From BBC ● Oct. 10, 2025

A radio telescope that discovered evidence of the Big Bang in 1964, revolutionizing the study of the universe, will remain in its original place on Crawford Hill in Holmdel, N.J, town officials announced last week.

From New York Times ● Oct. 20, 2023

A radio telescope works more like a light meter than a camera.

From "Cosmos" by Carl Sagan