cosmic microwave background

noun

Examples of cosmic microwave background in a Sentence

Recent Examples on the Web
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While there was basic agreement with the Lamba CDM model, when those first-year results were combined with data from other studies (involving the cosmic microwave background radiation and Type Ia supernovae), some subtle differences cropped up. Jennifer Ouellette, Ars Technica, 19 Mar. 2025 The photos show light, dark and the polarization of light—background radiation known as the cosmic microwave background, and details the movement of hydrogen and helium gas at the beginning of the universe. Dan Perry, Newsweek, 18 Mar. 2025 Aging the Universe Research by the Atacama Cosmology Telescope collaboration has led to the clearest and most precise images yet of the universe’s infancy, the cosmic microwave background radiation that was visible only 380,000 years after the Big Bang. Monica Cull, Discover Magazine, 18 Mar. 2025 The images of the cosmic microwave background (CMB), which is a fossil relic of the first light in the universe, reveal what the 13.8 billion-year-old cosmos was like just 380,000 years after the Big Bang. Robert Lea, Space.com, 18 Mar. 2025 See All Example Sentences for cosmic microwave background

Word History

First Known Use

1981, in the meaning defined above

Time Traveler
The first known use of cosmic microwave background was in 1981

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Cite this Entry

“Cosmic microwave background.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmic%20microwave%20background. Accessed 16 Apr. 2025.

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