cosmic background radiation


Examples of cosmic background radiation in a Sentence

Recent Examples on the Web The sparse pockets of space that contain little but cosmic background radiation, leftover energy from the formation of the universe, hover in at around 2.7 kelvin. Jennifer Leman, Popular Mechanics, 22 Nov. 2022 The cosmic background radiation, a burst of universe-wide energy that was released just 380,000 years or so after the Big Bang has a red shift of about 1,100. Jeffrey Kluger, Time, 13 Dec. 2022 Jane listens to the crackle of white noise—cosmic background radiation—a faint reminder of the big bang. Seija Rankin,, 5 Jan. 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'cosmic background radiation.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

circa 1976, in the meaning defined above

Time Traveler
The first known use of cosmic background radiation was circa 1976

Dictionary Entries Near cosmic background radiation


cosmic background radiation

cosmic dust

Cite this Entry

“Cosmic background radiation.” Dictionary, Merriam-Webster, Accessed 25 Feb. 2024.

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