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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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Scientists could also search the cosmic microwave background for subtle patterns that might preserve information from a time before the Big Bang.

From Science Daily Aug. 11, 2026

As a result, the enhanced clustering does not create a stronger gravitational imprint on the cosmic microwave background.

From Science Daily Aug. 2, 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

They’ve measured the cosmic microwave background, or leftover radiation from the Big Bang, with extremely high precision to help paint a picture of the first nanoseconds of the universe.

From Salon Jan. 17, 2025

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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