Linked from

The 162 pages that link to Cosmic microwave background, each with the reason it gives.

• Radio astronomyBroader topic: Its radio and microwave measurements test models of the universe's origin and evolution.

• RedshiftBroader topic: Cosmic expansion redshifted this radiation from visible and infrared wavelengths into microwaves.

• Black-body radiationBroader topic: Its near-ideal spectrum is a precision cosmic example of black-body radiation.

• Big BangBroader topic: Its spectrum and small temperature variations preserve evidence from about 380,000 years after the beginning of expansion.

• Planck's lawBroader topic: Its near-perfect spectrum is a prominent measured instance of Planck radiation.

• Cosmological redshiftBroader topic: Its enormous cosmological redshift records expansion since the universe became transparent.

• CosmologyBroader topic: Its tiny temperature variations preserve a map of early cosmic structure.

• AstronomyBroader topic: Its tiny temperature variations preserve evidence about the universe’s early conditions.

• Observable universeBroader topic: It marks the earliest electromagnetic light that can be observed directly.

• Thermodynamic temperatureBroader topic: Its spectrum provides a precise example of assigning thermodynamic temperature to radiation.

• AstrophysicsBroader topic: Its measured patterns constrain the universe's early conditions, composition, and expansion history.

• George GamowBroader topic: Gamow’s group predicted relic radiation from the hot early universe, although its discovery came later.

• KelvinBroader topic: Its present temperature is measured in kelvins and constrains cosmological history.

• Scale factorBroader topic: Its observed temperature and spectrum preserve evidence of the universe’s expansion since recombination.

• Wien's displacement lawBroader topic: Its measured blackbody spectrum has a peak wavelength corresponding to its present temperature.

• Astronomical observationBroader topic: Its measured temperature pattern constrains the universe’s age, composition, and history.

• Particle horizonBroader topic: Its observable regions show how the horizon limits early causal contact.

• Lookback timeBroader topic: Its photons have traveled for nearly the entire age of the universe.

• Brightness temperatureBroader topic: Its measured spectrum is closely described by a blackbody brightness temperature near 2.7 kelvin.

• Robert HermanBroader topic: It is the radiation whose present temperature Herman and Alpher estimated.

• Black bodyBroader topic: Its near-ideal spectrum is a striking natural example of black-body radiation.

• Kelvin scaleBroader topic: Its measured temperature is a prominent cosmological use of the scale.

• Photon gasBroader topic: It is an exceptionally precise natural example of a nearly thermal photon gas.

• Robert Woodrow WilsonBroader topic: The excess antenna temperature Wilson and Penzias found was identified as this radiation.

• Space scienceBroader topic: Its measured patterns constrain the universe's age, composition, and evolution.

• Radiation (physics)Broader topic: This relic radiation preserves evidence about the universe's early conditions.

• Discovery of cosmic microwave background radiationBroader topic: The unexplained microwave signal was identified as this relic radiation.

• Inflationary epochBroader topic: Its temperature and polarization patterns constrain the perturbations inflation predicts.