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Originally Posted by Stompy
As for the color of stars.. doesn't it have to do with how fast they're moving in relation to us?
I was reading something that said.. if you could go the speed of light, things in front of you would be blue while things behind you would be red. It later went to give examples of red/blue stars.
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That is the doppler affect and it just causes a shift towards that color, not for it to be that color. To sum it up as simply as I can:
A star emits light waves, if the star is moving towards the observer, the waves get compressed together, increasing their frequency, if the star is moving away from the obsever, the waves are stretched, decreasing their frequency. And since light color is based upon it's wavelength, this shifts the color of the light either towards blue or red.