microwave background


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microwave background

microwave background

n
(Astronomy) a background of microwave electromagnetic radiation with a black-body spectrum discovered in 1965, understood to be the thermal remnant of the big bang with which the universe began
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References in periodicals archive ?
This 'cosmic microwave background' - CMB - shows tiny temperature fluctuations that correspond to regions of slightly different densities at very early times, representing the seeds of all future structure: the stars and galaxies of today.
The famous microwave background arises from the hot gas that filled the universe 380,000 years after the Big Bang.
Using this approach, it is demonstrated that the microwave background could not have a cosmological origin.
This volume contains 40 papers from a 2003 symposium devoted to maps of the distribution of galaxies and of temperature fluctuations in the cosmic microwave background and what they can tell us about the structure, geometry, and evolution of the universe.
Washington, June 14 ( ANI ): Theories of the primordial Universe predict the existence of knots in the fabric of space - known as cosmic textures - which could be identified by looking at light from the cosmic microwave background (CMB), the relic radiation left over from the Big Bang.
Those would be the radio photons of the cosmic microwave background radiation.
The Far-Infrared Absolute Spectrophotometer (FIRAS) on the COBE satellite, gives different temperatures of the Cosmic Microwave Background. This deviation has a theoretical explanation in the Doppler effect on the dipole (weak) component of the radiation, the true microwave background of the Universe that moves at 365 km/sec, if the monopole (strong) component of the radiation is due to the Earth.
In 12 succinct chapters Silk describes the building blocks of the cosmos, the expansion of the universe, and the cosmic microwave background. He examines the first moment of the universe, and the genesis of baryons and helium.
If immediately after the Big Bang, our universe grew at a pace that vastly outstripped the speed of light, a trace of that period of inflation should be seen in a peculiar polarization of the cosmic microwave background. Though this signature of polarization has yet to be conclusively detected, the work by Greaves and her colleagues offers some hope that it could be.
In recent years, astronomers have studied the radiation afterglow of the Big Bang, known as the cosmic microwave background, or CMB.
Gravitational lensing is a very useful tool for studying distant objects in space, but it can also create problems for astronomers who study the Cosmic Microwave Background - the omnipresent radiation from soon after the Big Bang, one of the few things which allow us to study the universe in its infancy.

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