Hope someone can help me out with this.
Does relativity mean that, due to the general expansion of the universe, time in different points in space passes at different rates? Ie: since distant galaxies are racing away from us at a significant fraction of the speed of light, will the rate of time passing in those galaxies be different than it is here?
Consider the hypothetical situation of a 'galactic empire' (as in any number of sci-fi universes). Would systems within that empire get out of sync due to this effect or is relativity not even a factor here? What about signals passing between distant systems, would there be appreciable frequency shift due to this effect?
