Rockinghorse Posted December 4, 2013 Share Posted December 4, 2013 Any objections so far?This applies only when the curvature of space-time is Euclidian. In real universe however there is no flat geometry anywhere in the universe, therefore this symmetry is always broken. And twins can always synchronize their clocks in real time and they can observe whose clock is slowing down due to uniform motion. More clear example is that GPS satellite can always synchronize its atom clock with Big Ben and therefore we can say that the clock of GPS satellite is slowing in real time. GPS satellite is in uniform motion, but it travels in curved space-time. Link to comment Share on other sites More sharing options...
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