Redshift is a real physical phenomena describing the way light wavelengths get "shifted" (stretched, to visualize) towards the red as they are seen coming from

Redshift is a real physical phenomena describing the way light wavelengths get "shifted" (stretched, to visualize) towards the red as they are seen coming from something moving away from the observer: http://en.wikipedia.org/wiki/Redshift http://en.wikipedia.org/wiki/Redshift http://en.wikipedia.org/wiki/Hubbles_law http://en.wikipedia.org/wiki/Hubbles_law