A couple questions. Assume that you can travel arbitraily close to the speed of light and that you have figured out how to communicate via Quantum entanglement (Like Ender's Game). I speed away from earth at almost the speed of light. At the point when I stop accelerating, is it not valid to say that I am standing still and the earth is moving away from me? If so why does time slow for me, instead of the earth? Why can this not be used to determine absolute speed instead of being limited to relative speed? What does this do to my quantum entangled communications? At what point does my mass cause me to become a black hole? The second related question is, how do we know that time actually slows? If all of the atoms in my body slow (because their vibrations/motion would also have a speed limit) it would seem to me like time has slowed but it is in fact more like suspended animation. It seems to me that without knowing what time is there is no way to know. If it is in fact just suspended animation then it isn't time travel but just a speed limit. I don't think this is just semantics. My question really asks if time is slowed at all or just our perception of time. Am I missing something?