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microwave background

British  

noun

  1. a background of microwave electromagnetic radiation with a black-body spectrum discovered in 1965, understood to be the thermal remnant of the big bang with which the universe began

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

microwave background Scientific  

Example Sentences

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The cosmic microwave background — the afterglow of the Big Bang — shows a small but persistent asymmetry: a preference for one spatial orientation over its mirror image.

From Science Daily May 22, 2026

Arno Penzias at Bell Labs won the Nobel Prize in Physics for discovering “cosmic microwave background radiation” from the Big Bang.

From The Wall Street Journal Mar. 29, 2026

However, interest in evolving dark energy was vigorously rekindled last year from the combination of supernovae, baryon acoustic oscillation, and cosmic microwave background data from the DES, DESI, and Planck experiments.

From Science Daily Nov. 4, 2025

The second method, called the early relic method, involves measuring the leftover light from the Big Bang in what is called the cosmic microwave background.

From Salon Dec. 9, 2024

However, I and several other people showed that, at least in its original form, it predicted much greater variations in the temperature of the microwave background radiation than are observed.

From "A Brief History of Time: And Other Essays" by Stephen Hawking

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