What is in the CMB cold spot?
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). At some points, the “cold spot” deviates 140 µK colder than the average CMB temperature.
What is the cold spot in the universe?
First observed by NASA’s Wilkinson Microwave Anisotropy Probe (WMAP) in 2004, and later confirmed by the European Space Agency’s Planck satellite, the so-called “CMB cold spot” is about 70 μK colder than the average CMB temperature, and appears in the southern celestial hemisphere.
How cold is the CMB?
The cosmic microwave background (CMB) is the fingerprint of the Big Bang. This remnant radiation occurs throughout the sky, with a temperature 2.73 degrees above absolute zero (about -454 degrees Fahrenheit, or -270 Celsius). While the CMB is fairly uniform, it does have some (very small) fluctuations.
Are we in KBC void?
As with other voids, it is not completely empty but contains the Milky Way, the Local Group, and a larger part of the Laniakea Supercluster. The Milky Way is within a few hundred million light-years of the void’s center.
What is the largest void in the universe?
the Boötes void
At nearly 330 million light-years in diameter (approximately 0.27% of the diameter of the observable Universe), or nearly 236,000 Mpc3 in volume, the Boötes void is one of the largest known voids in the Universe, and is referred to as a supervoid. Its discovery was reported by Robert Kirshner et al.
How old is the CMB?
13.7 billion years ago
The CMB radiation was emitted 13.7 billion years ago, only a few hundred thousand years after the Big Bang, long before stars or galaxies ever existed.
Is the CMB black body radiation?
The Cosmic Microwave Background is blackbody radiation at a temperature of 2.725 Kelvin. The Cosmic Microwave Background is a relic of the time when the universe was hot, dense, and opaque.
Is the CMB a cold spot in the sky?
CMB cold spot. The circled area is the cold spot. 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 cosmic ‘Cold Spot’. Possible detention of a Parallel Universe. (Image from ESA and Durham University via http://www.astronomy.com) A Cold Spot is a region of our Universe that when measured by background radiation it is significantly colder to other surrounding areas within the Cosmos.
What was the cold spot in the Big Bang?
Syed Faisal ur Rahman delves into the various explanations for the strange “cold spot” in the cosmic microwave background, the ancient light of the Big Bang, that bathes the universe Arctic anomaly: A map showing the cosmic microwave background (CMB) temperature as observed by ESA’s Planck satellite.
Why is the CMB a perfect record of the universe?
This relic radiation is therefore a perfect record of our universe during its infancy. The CMB as we detect it today has been stretched to its current microwave wavelength due to the universe’s expansion, and cooled to a temperature of just 2.7 K.