Originally Posted by
Pete
Exactly. So by saying he could do it in one afternoon, he could travel there and it may take
him 42 minutes or a few hours or whatever, but to the rest of us, no time will have passed at all. So theoreticly he could go there, spend some time and come back and the only time that will have passed for us in comparison to him will be whatever time he chooses to spend on Mars. So technically, he could do it in an afternoon
Wrong way around. Time for him would go slower, so that less time would pass for him. We would observe him travelling for 42 minutes, chilling wherever, then travelling back, when he would only observe a fraction of that time at near light speed (it would seem like 3 minutes to him, or something like that)