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I heard that one twin returned to earth from the moon younger than the one remaining on earth
When a light photon travels from a galaxy 10B light years away from earth to another galaxy 9B light years away from earth
would the same not happen as above to anybody observing on the galaxy 9B light years away from us?
That is, would a change in time for the photon not decrease upon reaching the '9B light years away from us' galaxy'?.....
So to an observer on the '9B galaxy' there exists a discrepancy in change of time wrt the arriving photon?
Thus is dark energy acceleration related to a relativistic time dilation parameter? Confusing?
But Why are Photons widely theorised or said to experience No Time?
I still feel that a photon from an ancient galaxy has more time dilation than one from a more recent galaxy closer to us
Yes , please move this to the cosmology section...I still feel that a photon from an ancient galaxy has more time dilation than one from a more recent galaxy closer to us explaining the acceleration of the expansion of space the further away from us.....man.....gone for camping....