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The CMB Cold Spot or WMAP Cold Spot is a region of the sky seen in microwaves that has been found to be unusually large and cold relative to the expected properties of the cosmic microwave background radiation (CMBR). The "Cold Spot" is approximately 70 μK (0.00007 K) colder than the average CMB temperature (approximately 2.7 K), whereas the ...
The cosmic microwave background was first predicted in 1948 by Ralph Alpher and Robert Herman, in a correction [16] they prepared for a paper by Alpher's PhD advisor George Gamow. [17] Alpher and Herman were able to estimate the temperature of the cosmic microwave background to be 5 K. [18]
Cold spots in the cosmic microwave background, such as the WMAP cold spot found by Wilkinson Microwave Anisotropy Probe, could possibly be explained by an extremely large cosmic void that has a radius of ~120 Mpc, as long as the late integrated Sachs–Wolfe effect was accounted for in the possible solution. Anomalies in CMB screenings are now ...
It would be associated with (and be the explanation of) a cold spot in the cosmic microwave background at the sky location. The evidence for such a "Great Void" is disputed by Smith and Huterer. [ 13 ]
Already in 1967, Dennis Sciama predicted that the cosmic microwave background has a significant dipole anisotropy. [42] [43] In recent years, the CMB dipole has been tested, and the results suggest our motion with respect to distant radio galaxies [44] and quasars [45] differs from our motion with respect to the cosmic microwave background.
The discovery of cosmic microwave background radiation constitutes a major development in modern physical cosmology. In 1964, US physicist Arno Allan Penzias and radio-astronomer Robert Woodrow Wilson discovered the cosmic microwave background (CMB) , estimating its temperature as 3.5 K, as they experimented with the Holmdel Horn Antenna .
It’s where some of the most important technological advancements of the 20th century — including the laser, the cell phone and even the discovery of cosmic microwave background radiation ...
In 2017, Courtois revealed two discoveries: one, called the Dipole repeller, and the other, on the cosmic microwave background cold spot, which could potentially explain the propagation of our galaxy through space at about 2 million kilometres per hour. [4]