cosmic background radiation
noun Astronomy.
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.
Also called
cosmic microwave background.
Words nearby cosmic background radiation
cosmeticize,
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cosmetology,
cosmic,
cosmic background radiation,
cosmic dust,
cosmic microwave background,
cosmic noise,
cosmic ray,
cosmic rays
Scientific definitions for cosmic microwave background
cosmic background radiation
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. Also called microwave background
Cultural definitions for cosmic microwave background
cosmic microwave background
The microwave radiation that arrives at the Earth from every direction in space. The detection of this radiation played an important role in acceptance of the Big Bang theory.
notes for cosmic microwave background
This radiation is sometimes referred to as the “echo” of the Big Bang.