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Spectral Line Motion in Binary Star Systems

Description
Spectral Line Motion in Binary Star Systems
The diagrams at the top indicate the positions and motions of the stars, labeled A and B, relative to Earth. Below each
diagram is the spectrum we would observe for these two stars at each stage. The changes in colors (wavelengths) of the
spectral lines are due to changes in the stars’ Doppler shifts, as seen from Earth
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