Ultimate fate of the universe

Ultimate fate of the universe

 
How would we identify the "red" shift of the celestial objects (with respect ...
 
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Ultimate fate of the universe discussion
 
MikeAngel
How would we identify the "red" shift of the celestial objects (with respect to their rapid movement away from each other), if we did not know "red"? Meaning, if we did not have a concept of colors and/or sound?