Motion of a light source, like stars in distant galaxies, causes the spectral lines to shift positions as well. An object's motion causes a wavelength shift Δλ = λnew - λres. The amount of shift in the spectral lines can tell astronomers how galaxies are moving relative to our position on Earth. The wavelength shift depends on
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Home » Physics » Motion of a light source, like stars in distant galaxies, causes the spectral lines to shift positions as well. An object's motion causes a wavelength shift Δλ = λnew - λres.