The rest of the Universe While the rest of the Universe is also moving relative to Earth None of any components of the Universe are in the same place from second to second If setting the destination of this fictional time machine takes 3 seconds you will need to allow for the movement of the Universe during those 3 seconds In fact (not fiction) you have to be EXACT and not even a nanosecond out There is ZERO tolerance within the reality of so-called time travel The ONLY way any of us will travel to the future is to live until we get there So far as going BACK the saying ' been there done that ' and no do over applies Please Register or Log in to view the hidden image!
There is no such reference point. If there were, relativity would be falsified. The only meaningful reference frame is your own, where you are stationary. Not a valid reference frame.
You can be stationery as in shooting at a moving target Hence you must allow for the moment of the target if you wish to hit it If you set your time machine controls for your destination for time and space coordinates you must consider yourself to be stationery at the moment you press the GO button Since you will not be stationery is another reason why you CANNOT travel in time Please Register or Log in to view the hidden image!