If I am 35 years old and I am in a train sitting in a special tube that is built around the entire circumference of the planet. Putting aside all of the questions of practibility and g forces and the like, if the train I am in accelerates to just a hair under the speed of light and I travel on this train until my 5 year old son is 35 years old, at which time my train wil come to a complete stop and I will disembark my "light speed" train and meet my son at the "train station" when I walk out, will we both be the same age? Follow up question is, whatever the number of revolutions around earth that my light speed train would make per day multiplied by 365 days multiplied by 30 earth years, would my light speed train in fact make that many revolutions or would it make less. To me, riding on the train, almost no time at all would have passed, but to my son, waiting for me outside the tube where my train is traveling at near light speed, 30 years would have passed. If there was a digital display outside the tube counting the revolutions one by one and adding to the total another "1" each time my train passed the starting point, at the end of 30 years I would have some very large number of revolutions. BUT if I, while riding this train, were wearing a watch AND this watch ALSO counted revolutions, would the amount of revolutions show the same as the counter outside the train counted AND would the time on my watch show that 30 years have passed or something much less?