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#1
February 13th 05, 08:09 PM
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red shift: doppler or einstein?
relativity predicts a red-shift for light traveling "up" in a gravity field.
doppler predicts a red-shift for light emitted from an object moving away from us. How can we distinguish the two? When we measure the red-shift of a distant object, how can we conclude that it moves away from us? It might also be that it is not moving away, but it is very heavy instead? -- md 10" LX200GPS-SMT ETX105 www.xs4all.nl/~martlian 
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