Redshifted
type: Concept
broader: Doppler shift

Astronomical techniques
type: Concept
narrower: Doppler shift

Blueshifted
type: Concept
broader: Doppler shift

Doppler shift
type: Concept
contributor: AAS Frey.Katie
modified: 2020-11-03T20:18:43.377Z
modified: 2020-11-03T20:18:56.967Z
alternative label: Doppler effect
broader: Astronomical techniques
definition: Effect of the relative motion of a wave source (light, sound) and the observer. If the source is moving away, the wavelength is stretched (shifted toward lower frequencies). If the source is approaching, the wavelength is compressed (shifted toward higher frequencies). These effects, known as Doppler shifts, are in the case of light waves called redshift and blueshift, respectively.
narrower: Redshifted
narrower: Blueshifted