- published: 25 Mar 2015
- views: 308897
The cosmic microwave background (CMB) is the thermal radiation left over from the time of recombination in Big Bang cosmology. In older literature, the CMB is also variously known as cosmic microwave background radiation (CMBR) or "relic radiation." The CMB is a cosmic background radiation that is fundamental to observational cosmology because it is the oldest light in the universe, dating to the epoch of recombination. With a traditional optical telescope, the space between stars and galaxies (the background) is completely dark. However, a sufficiently sensitive radio telescope shows a faint background glow, almost isotropic, that is not associated with any star, galaxy, or other object. This glow is strongest in the microwave region of the radio spectrum. The accidental discovery of CMB in 1964 by American radio astronomers Arno Penzias and Robert Wilson was the culmination of work initiated in the 1940s, and earned the discoverers the 1978 Nobel Prize.
Cosmic Microwave Background Explained | Space Time | PBS Digital Studios
Cosmic Microwave Background Challenge | Space Time | PBS Digital Studios
Cosmic Microwave Background Radiation - Sixty Symbols
Cosmic Microwave Background Radiation
Exploring the Dark Universe: Cosmic Microwave Background
Picture of the Big Bang (a.k.a. Oldest Light in the Universe)
The Cosmic Microwave Background explained
50 Years of the Cosmic Microwave Background Radiation: What We Have Learned, What Questions Remain
Science Documentary: Cosmic Microwave Background the oldest light in the universe
18. Cosmic Microwave Background Spectrum and the Cosmological Constant, Part I