Instead, many astronomers thought the cold spot might be an optical illusion produced by something in the foreground. He explained: “Differences in the temperature of the CMB relate to different densities, and it is these that spawned the formation of structure in the universe — including galaxies, galaxy clusters … This much we know. For example, Dr Clements points out that simply by using an isolated depression, an unusual CMB cold spot can be better represented.
However, statistically, and given our model for the early Universe (which describes things pretty well, including the distribution of galaxies we see today), a spot of that shape, size and temperature has a very low probability to exist. Now, by eye the Cold Spot doesn’t look any different from other cold spots around the map. Now, by eye the Cold Spot doesn’t look any different from other cold spots around the map. Categories Astronomy, Cosmology, milky way, Missions, Science Tags anomalies, CMB, Cold Spot, WMAP 12 Replies to “Seven-Year WMAP Results: No, They’re NOT Anomalies” Lawrence B. Crowell says: The “cold spot” is an anomaly in the CMB which dates from the time the universe became transparent, 380,000 years after the instant of the Big Bang. Now, by eye the Cold Spot doesn’t look any different from other cold spots around the map. Compared to the cold spot, which is about 70 microkelvin cooler than the CMB's average, the effect is small. However, statistically, and given our model for the early Universe (which describes things pretty well, including the distribution of galaxies we see today), a spot of that shape, size and temperature has a very low probability to exist. For example, the famous ‘CMB cold spot’, an unusually low temperature region in the CMB, can be felt as a small but isolated depression.” The CMB can be printed from a range of 3D printers, and two files types have been created by the team: one for simple single-colour structures and one that includes the temperature differences … However, statistically, and given our model for the early Universe (which describes things pretty well, including the distribution of galaxies we see today), a spot of that shape, size and temperature has a very low probability to exist. But the point was to show that voids could create cold spots.
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