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Listen to native speakers pronounce “redshift” as a verb in real conversational contexts with synchronized timestamps and subtitles.
A given red shift is simply the size of the universe now, divided by the size of the universe, or the scale factor, as it was when the light was emitted.So redshift 0-- well, 1 plus 0 by advanced mathematics is 1, that just means we're looking at the universe now.A red shift 1 means that we're looking at the universe back when essentially all distances were half of their present value.