Okay, I don't know really if this is the right forum to ask this in, so I apologize if it ain't. I will also add that I am 16 years old and from Sweden, so pardon my English. The question I have is the following: I read a short part of a chapter in our physics book in school which was about Einstein's theory of relativity, and there were an example in the book about time and relativity, I didn't really get all of it but at least I understood a bit of it. It was about a train travelling between two lights with a constant speed. If you used a sensor at the exact time you where in the exact middle of these two lights, and measured the time it took for each of the lights to reach the sensor, the light which you were travelling towards would reach the sensor first, since the train had a speed in that direction, while on the other hand the light which you were travelling from would be delayed. On the other hand, if you would just stand still in the exact middle of these two lights, theoretically the sensor would display that both of the lights reached the sensor at the exact same time. So, what if our whole universe was moving in a direction with a very high speed. This would mean that the stars we measured which was in the direction from earth which the universe was moving would be further away than we have measured. Because if it takes the light from a star 9.000 years to reach earth, if we have a velocity towards that star, that would mean the light would reach us in a speed of the velocity of light + the velocity of universe towards that star, which would result in a shorter time than if only the light was moving. I am sorry for explaining so bad, but I hope you got about what I meant. I hope this ain't the theory of relativity (what I just explained with universe and everything), because when I think about it that would make pretty much sense. I didn't read the whole chapter so I don't know. What do we relate to when we do all of our measurements? What is the "original" position which ain't got no speed or anything, and how can we be sure about that? If there were something that was unclear please ask me what I meant with it. Thanks, Karl.