cosmic microwave background radiation(redirected from Atacama Pathfinder EXperiment /SZ)
Also found in: Thesaurus.
cosmic microwave background radiation
Microwave radiation that penetrates space throughout the universe, postulated to be residual electromagnetic radiation originally emitted by warm matter in the universe approximately 400,000 years after the Big Bang. Also called cosmic background radiation, cosmic microwave background, microwave background.
Switch to new thesaurus
|Noun||1.||cosmic microwave background radiation - (cosmology) the cooled remnant of the hot big bang that fills the entire universe and can be observed today with an average temperature of about 2.725 kelvin|
cosmogeny, cosmogony, cosmology - the branch of astrophysics that studies the origin and evolution and structure of the universe
cosmic radiation - radiation coming from outside the solar system