Astron. the shift of spectral lines toward the longer wavelengths and lower frequencies at the red end of the spectrum in a luminous celestial body, indicating that the light source is moving rapidly away from the observer: thought to be a Doppler effect explaining an expanding universe, or the result of a strong gravitational field
also written red shift
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
- redshifted adjective
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