Extragalactic background light
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180899259
2007-12-30T01:33:26Z
Catslash
1883085
Fenomenological description: spellings and formating (I assume those weren't valid US spellings)
The '''Extragalactic Background Light''' (EBL) or simply the "extragalactic background" (EGB)
is the faint diffuse light of the night sky, consisting of the combined flux of all extragalactic sources. Its main significance for astronomers is that it contains information regarding the history and formation of other galaxies, and also the [[large-scale structure]] of the universe.
== Phenomenological description ==
The extragalactic background is usually divided into six wavelength ranges, which do
not follow strictly the usual domains of the [[electromagnetic spectrum]]:
*CGB: Cosmic gamma-ray background
*CXB: Cosmic X-ray background
*CUVOB: Cosmic ultra-violet and optical background
*CIB: [[Cosmic infrared background]]
*CMB: [[Cosmic microwave background]]
*CRB: Cosmic radio background
[[Image:Extragalactic-background-power-density.jpg]]
== See also ==
[[Cosmic microwave background radiation|Cosmic Microwave Background (CMB) radiation]]
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