cosmic microwave background

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English

Alternative forms

  • CMB (initialism)

Etymology

It was originally called the primeval fireball.

Pronunciation

  • Audio (US):(file)

Noun

cosmic microwave background (uncountable)

  1. (astronomy) Faint thermal radiation that pervades all space and is thought to be the remnants of the big bang, produced during the epoch of recombination.

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