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This simplified animation shows how light redshifts and how distances between unbound objects change over time in the expanding Universe. The farther a galaxy is, the faster it expands away from us, and the more its light appears redshifted. A galaxy moving with the expanding Universe will be even a greater number of light years away, today, than the number of years (multiplied by the speed of light) that it took the light emitted from it to reach us. (Credit: Rob Knop)