CMBR (cosmic microwave background radiation)

CMBR is actually cosmic microwave background radiation. this is actually the thermal radiation left over from the time of big bang cosmology. this radiation. it is not associate with any star galaxy or any celestial body but is actually left over radiation after the big bang. it is in the microwave spectrum of electromagnetic wave. this means that it cannot be seen with the naked eyes but gets detected as a fain glow in radio telescopes.