Hello everyone, The questions I am about to ask have probably been explained already, but even after everything I've read I still cannot understand how this experiment would play out and how to answer these questions. So without further ado here is the experiment: Imagine you have person A standing still while person B is riding a train in a small circular route around him (they can see each other) at near the speed of light. For B, he has been travelling for 1 year. Let's consider (if we can) that the ratio of time dilation is: 1 year for B corresponds to 50 years for A. Questions: 1) How much time does A think has passed? 2) If the answer is 50 years, then B must have seen A aging very quickly no? Which is to say, would B see the life of A like in fast forward motion? 3) Would A see the clock on the train in slow motion? 4) If the answer is yes, is the train also in slow motion (doesn't make much sense)? I apologize for the ignorance, and I appreciate the time and answers!