Definitions for "Cosmic background radiation"
Keywords:  bang, remnant, cmbr, cosmological, cmb
The microwave radiation coming from all directions that is believed to be the red-shifted glow of the Big Bang.
The primordial radiation field that fills the universe. It was created in the form of gamma rays at the time of the big bang, but has since cooled so that today its temperature is 3 K and its peak wavelength is near 1.1 millimeters (in the microwave portion of the spectrum). Also known as the 3-degree background radiation. Also called cosmic microwave background radiation, CMBR.
This is the radiation left behind by the Big Bang. Its detectable today as radio-wavelength radiation, for example in the COBE map of the entire night sky.