ASTRONOMICAL QUANTITIES SPECTRA & SPECTROSCOPY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site red shift Astronomynotes.com The displacement of spectral lines in the spectrum of an object toward longer wavelengths. If caused by the line-of-sight recession of the object (see Doppler effect), as is usually the case, this displacement, when measured, allows the recessional velocity to be calculated. Redshift is given by the formula: Compare with blue shift. Related categories    • ASTRONOMICAL QUANTITIES    • SPECTRA AND SPECTROSCOPY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP