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 wis the culmination o wirk initiatit in the 1940s, an earned the discoverers the 1978 Nobel Prize.
- Penzias, A. A.; Wilson, R. W. (1965). "A Measurement of Excess Antenna Temperature at 4080 Mc/s". The Astrophysical Journal. 142 (1): 419–421. Bibcode:1965ApJ...142..419P. doi:10.1086/148307.
- Smoot Group (28 Mairch 1996). "The Cosmic Microwave Background Radiation". Lawrence Berkeley Lab. Retrieved 11 December 2008.