In the recent telescope image released by NASA, some stars seem to be either more “warm toned” or “cool toned”. I’m just brainstorming but is it related to the distance from Earth? Or perhaps it’s dependent on the elemental makeup. Are they actually different colors or do we just perceive them that way? TIA
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It’s because of blueshift/redshift dynamics. Because of the Doppler effect, light from an object coming towards you will be more compressed and thus bluer while light from objects moving away from you will be more stretched and appear redder.
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