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

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microwave background Scientific  

1. See cosmic background radiation

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Example Sentences

The cosmic microwave background, which is the faint afterglow left behind by the Big Bang, contains valuable information about the early universe.

From Science Daily

The team also discovered that when this phase uncertainty is considered, cosmic birefringence influences another signal in the cosmic microwave background known as the EE correlation.

From Science Daily

They used measurements of the cosmic microwave background to estimate how matter was distributed shortly after the Big Bang.

From Science Daily

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

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