Gravitational redshift distortion comes about from the net gravitational redshift, or blueshift, that is acquired when the photon climbs out of the gravitational potential well of the distant galaxy and then falls into the potential well of the Milky Way galaxy.
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Although the Global Positioning System ( GPS ) is not designed as a test of fundamental physics, it must account for the gravitational redshift in its timing system, and physicists have analyzed timing data from the GPS to confirm other tests.
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In 1960 Robert Pound carried out together with his assistant Glen Rebka an experiment, the Pound Rebka experiment, using the M�ssbauer effect to measure the gravitational redshift of the radiation from a gamma source in the gravitation field of planet Earth.
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It is a gravitational redshift experiment, which measures the redshift of light moving in a gravitational field, or, equivalently, a test of the general relativity prediction that clocks should run at different rates at different places in a gravitational field.
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Gravitational blueshift contributes to cosmic microwave background ( CMB ) anisotropy via the Sachs Wolfe effect : when a gravitational well evolves while a photon is passing, the amount of blueshift on approach will differ from the amount of gravitational redshift as it leaves the region.
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:Alternatively you can simply realize that gravitational redshift is equivalent to a Doppler redshift in which the photon energy is different depending on the observer because the observers are moving relative to each other . talk ) 18 : 24, 28 October 2011 ( UTC)
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As TenOfAllTrades pointed out, there does exist an alternative definition of the phrase " surface gravity ", which is basically the Newtonian surface gravity renormalized by multiplying it by the gravitational redshift factor, and that renormalized value does go to zero as M increases.
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A very accurate gravitational redshift experiment, which deals with this issue, was performed in 1976, where a hydrogen maser clock on a rocket was launched to a height of 10, 000 km, and its rate compared with an identical clock on the ground.
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Then I noted that " redshift " has 83 times as much coverage than all the " gravitational redshifts ", which would imply that all the " specific " redshifts are neglible ( less than 1.2 %, which didn't make sense ).
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Prior to Keplerian orbits and three post-Keplerian corrections ( the rate of periastron advance, a factor for gravitational redshift and time dilation, and a rate of change of the orbital period from gravitational radiation emission ) is sufficient to completely model the binary pulsar timing.
