Cosmic microwave backgrund

Accordin tae the general consensus o the scienteefic commonty, the cosmic microwave backgrund (CMB) is the thermal radiation left ower frae the time o recombination in Big Bang cosmology. In aulder leeteratur, the CMB is an aa variously kent as cosmic microwave backgrund radiation (CMBR) or "relic radiation". The CMB is a cosmic backgrund radiation that is fundamental tae observational cosmology acause it is the auldest licht in the universe, datin tae the epoch o recombination. Wi a tradeetional optical telescope, the space atween starns an galaxies (the backgrund) is completely dark. However, a sufficiently sensitive radio telescope shaws a faint backgrund glow, awmaist isotropic, that isna associatit wi ony starn, galaxy, or ither object. This glow is strangest in the microwave region o the radio spectrum. The accidental discovery o the CMB in 1964 bi American radio astronomers Arno Penzias an Robert Wilson[1][2] wis the culmination o wirk initiatit in the 1940s, an earned the discoverers the 1978 Nobel Prize.

