the after glow of thermal radiation left over from the early epoch of the Universe.
Observable radiation (in the microwave portion of the electromagnetic spectrum) left over from the big bang, the cosmic microwave background is considered proof of the big bang. Check out these CfPA cosmic microwave background links: Max and Minima CMB astrophysics research page Big bang cosmology primer The cosmic microwave background
(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
Left-over radiation from the beginning of the universe, or "Big Bang". (Not "Big Band", as I was quoted as saying in the Fox News interview. There are few serious astronomers today who believe that the universe began with Duke Ellington, though the theory still holds considerable sway in some jazz circles.) Studying the Cosmic Microwave Background is best done from space or from the South Pole.
The afterglow of the big bang. The cosmic microwave background (CMB) permeates the universe, glowing faintly at 3 Kelvins. The CMB, predicted to exist as an aftereffect of an expanding universe which was once confined to a small volume, was discovered in the early 1960's by Arno Penzias and Robert Wilson. This phenomenon provides evidence in support of the big bang theory.
This is the light radiation "leftover" after the decoupling of photons from matter about 300,000 years after the Big Bang. We study the perturbations, or disturbances, in the radiation in hopes of one day discovering the ultimate fate of our universe. Curious about the CMB? Check out Wayne Hu's CMB Tour: http://background.uchicago.edu/~whu/.
"Fossil" radiation from the time 500,000 years after the Big Bang, when atoms formed and the universe became transparent.
See Cosmic Background Radiation (CBR).