Concept information
Terme préférentiel
blueshift
Définition(s)
- A blueshift is a general displacement of spectral lines to shorter wavelengths that happens when a source of electromagnetic radiation moves toward the observer: the greater the velocity of approach along the line of sight, the greater the blueshift. Individual stars within the Milky Way Galaxy frequently show blueshifts. However, with the exception of a few galaxies within the Local Group, including the Andromeda Galaxy, most extragalactic objects exhibit redshifts, due to the overall expansion of the universe. (Encyclopedia of Science, by David Darling, https://www.daviddarling.info/encyclopedia/D/Doppler_effect.html#blueshift)
Concept(s) générique(s)
Synonyme(s)
- blue shift
Traductions
-
français
-
décalage vers le bleu
URI
http://data.loterre.fr/ark:/67375/MDL-CGDD9N90-P
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