cosmic background radiation

noun

, Astronomy.

1. electromagnetic radiation coming from every direction in the universe, considered the remnant of the big bang and corresponding to the black-body radiation of 3 K, the temperature to which the universe has cooled.

cosmic background radiation

1. Weak radio-frequency radiation traveling through outer space with equal intensity in every direction. It is thought to be residual radiation from a period shortly following the big bang , when the universe was very hot.
2. Also called microwave background

Example Sentences

This method is complemented by another method that analyzes irregularities in the so-called cosmic background radiation; an ancient form of light dating back to shortly after the Big Bang.

From Science Daily

This cosmic background radiation was the afterglow of the big bang.

From Literature

Huge cosmological experiments have failed to find the much-sought-after fingerprint of inflation in the cosmic background radiation, and some theorists feel that the theory has outlived its usefulness.

From Nature

If another bubble collided with ours, telltale marks might appear in the cosmic background radiation left over from the big bang.

From Scientific American

In fact, this thermal cosmic background radiation has been detected.

From Scientific American