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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Have you heard the horn of a train as it gets closer vs as it gets farther away? Notice as it approaches it sounds higher pitched And as it leaves it sounds lower pitched. This is called the doppler effect; as something gets closer the sound/light compresses, as it gets further sound/light stretches. So a blue star means that either we’re moving closer to it or it’s moving closer to us, on the other hand, a red star indicates we’re moving further apart.
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