| 释义 |
red shift
noun
: a displacement of a spectrum toward longer wavelengths: as
a. : such displacement in the spectrum of a celestial body usually caused by the Doppler shift that results from a recession relative to the observer
b. : a shift in the spectrum of galaxies outside the local group that is interpreted as a Doppler shift, increases in proportion to distance, and constitutes evidence for belief in the expanding universe |