radio astronomy

noun

: astronomy dealing with radio waves received from outside the earth's atmosphere
radio astronomer noun
radio astronomical adjective

Examples of radio astronomy in a Sentence

Recent Examples on the Web
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It’s hoped that the upcoming Square Kilometer Array radio astronomy observatory will help researchers look for technosignatures in the cosmos. Jamie Carter, Forbes.com, 8 July 2025 An unprecedented low-frequency radio astronomy experiment is now underway, 18 months after entering an orbit beyond the far side of the moon. IEEE Spectrum, 2 Dec. 2019 Intensity interferometry, a method traditionally used in radio astronomy, is able to cut through these distortions and involves measuring intensity fluctuations of light received at separate detectors. Micah McCartney, MSNBC Newsweek, 28 May 2025 The possibility is a bright spot for American radio astronomy. Sarah Scoles, Scientific American, 28 May 2025 See All Example Sentences for radio astronomy

Word History

First Known Use

1948, in the meaning defined above

Time Traveler
The first known use of radio astronomy was in 1948

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Cite this Entry

“Radio astronomy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radio%20astronomy. Accessed 21 Jul. 2025.

Kids Definition

radio astronomy

noun
: astronomy dealing with electromagnetic waves of radio frequency received from outside the earth's atmosphere
radio astronomer noun

More from Merriam-Webster on radio astronomy

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