We’ve all seen this little fellas up there. Two brothers, twins, in their 60’s. And they decide that one of them is going to take a trip into space, let’s say for a year, at 99% the speed of light. The other brother stays there, waiting for his twin to return, and looking at the light clock that his brother installed in the outside of the rocket, so he on earth could always take a look at it. Finally the day comes, and brother number 1 is looking at his pocket light clock as he took his morning coffee like every other day, before going onboard the rocket and leave his planet for one year. He sits in the little chair in the rocket, and while looking at his watch, gets launched into space at 0.99c On the other hand, brother number 2 is standing in the hill, looking at his brother going into space, and he quickly realizes that his brother’s light clock got slowed down, a lot, in relation to his owns, and he calculates that a year for his brother would be something like 30 for him. But he patiently sits there, and waits, and gets old. The day his brother arrives, they go running to see each other and for the surprise of brother number 1, his brother was now 90, while he is now 61. Brother number 2 in the other hand, get’s shocked at the image of his now young brother, but he already knew what was going to happen, as he calculated 30 years before. The problem for me here is the following: Brother number 1 traveled a year at 0.99c. When he departed, he was looking at his clock and glancing through the window of the rocket at his brother clock’s, and from his point of view, his brother’s clock got slower, as the earth was launched out of the rocket, which for him was stationary. For him, the clock on earth was moving away and getting slower, so he thought he was getting older faster than his brother. What happens to the end of this story from the point of view of the voyager, in this case brother number 1? This story for me seems to have two different ends. Am I alone in this?