Astronomy Answers
From the Astronomical Dictionary


[Astronomy Answers] [Dictionary] [AnswerBook] [Universe Family Tree] [Science] [Starry Sky] [Planet Positions] [Calculate] [Colophon]

The description of the word you requested from the astronomical dictionary is given below.

the blueshift

A blueshift is a doppler shift of distinguishing marks (such as spectral lines) in the frequency spectrum of light to greater frequencies, so that yellow light changes in the direction of blue. The opposite of blueshift is redshift.