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red shift

or red·shift (rĕd′shĭft′)
An increase in the wavelength of radiation emitted by a receding celestial object as a consequence of the Doppler effect.

[From the fact that the longer wavelengths of light are at the red end of the visible spectrum.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Astronomy) a shift in the lines of the spectrum of an astronomical object towards a longer wavelength (the red end of an optical spectrum), relative to the wavelength of these lines in the terrestrial spectrum, usually as a result of the Doppler effect caused by the recession of the object. Compare: blueshift
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014



a shift in the spectrum of a celestial object toward longer wavelengths, caused by the object's movement away from the viewer.
red′shift`ed, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.redshift - (astronomy) a shift in the spectra of very distant galaxies toward longer wavelengths (toward the red end of the spectrum); generally interpreted as evidence that the universe is expanding
astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a whole
propagation - the movement of a wave through a medium
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References in periodicals archive ?
Redshifts, on the other hand, are presumably rather less reliable in such a densely packed cluster because of gravitational interference.
The same equation relates light-travel time to redshifts for both the dichotomous and the de Sitter cosmologies, making it easy to compare both models using our testing framework.
In order to test the hypothesis of redshift dependence governed by the D(z) of (1) one should do as in Figure 10, that is, rescale the slope taking into account the difference of redshifts.
The seven galaxies described by Ellis and his team all have redshifts higher than 8.5.
Because of the expansion of the Universe, objects with large redshifts are not only far away, they are also observed as they were a long time in the past.
Other subjects detailed are coordinated instruments for source detection and characterization, redshift determination algorithms for broadband spectroscopic data, monitoring phase calibrators at submillimeter wavelengths, dense gas at high redshifts, astrometric imaging of high redshift galaxies at 345 GHz, and tracing the evolution of disk galaxies with galactic structures and gas kinematics.
The evidence that is the most difficult to explain away is the quantization of the cosmological redshift and the non-Doppler nature of quasar redshifts.
Tifft returned to research on galaxies, combining his data on the brightness and color of Virgo cluster galaxies with data on their redshifts. [The conventional view is that the farther a galaxy is from us, the more the light appears shifted toward the red end of the spectrum.]
"Now if you assume that all galactic redshifts are always due to velocity of retreat and distance, such a galaxy would seem to be immensely distant, even if it were, in fact, only a few million light-years distant," Campbell concludes.
Our model is inspired by the tired-light theory that was first proposed by [1] to explain cosmological redshifts, which has been subject to other investigations [2-4].
Photometric redshifts are less accurate than spectroscopic ones, which measure narrow spectral lines.