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Cosmic microwave background
/kˈɒzmɪk mˈaɪkɹəʊwˌeɪv bˈakɡɹaʊnd/
/kˈɑːzmɪk mˈaɪkɹoʊwˌeɪv bˈækɡɹaʊnd/Cosmic microwave background
01
(cosmology) the faint glow of radiation spreading through the universe, believed to be residual radiation from the Big Bang
