The displacement of spectral lines towards longer wavelengths (the red end of the spectrum) in radiation from distant galaxies and celestial objects. This is interpreted as a Doppler shift that is proportional to the velocity of recession and thus to distance.
〔天文〕红移。比较BLUE SHIFT
Compare with blue shift
Example sentencesExamples
Does a red shift really mean an expanding universe?
Most cosmologists - with the interesting exception of Hubble himself - came to the immediate conclusion that the red shift could only mean that the universe was expanding.
This effect is known as the gravitational red shift.
In 1929 Edwin Hubble's systematic observations of other galaxies confirmed the red shift.
This red shift should result in different relative emissions at different wavelengths.