redshift

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Looking at how the wavelength of their light has stretched - a property known as the redshift - has allowed us to infer how much the universe has expanded since the light left the supernova.

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Definitions (1)

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  1. (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

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Examples (32)

  • In this view, the redshift is caused by actual speed of recession, but the motion has nothing to do with cosmological expansion of the universe. —  BEN BOVA Editor
  • Or is the universal expansion of the universe, the whole Hubble redshift-distance relationship, merely an incorrect interpretation of the evidence? —  BEN BOVA Editor
  • In 1998, two separate research groups, The Supernova Cosmology Project and The High-redshift Supernova Search Team, attempted to measure how fast the universe was slowing down—in other words, the change in the rate of expansion. —  AnalogSFF,July-August2008
  • After examining many of these supernovae at various distances from the solar system, the High-redshift Team reported that our universe was not slowing down. —  AnalogSFF,July-August2008
  • Although the redshift is related to velocity of recession, the velocity is related to the distance. —  Aeon Eight
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