There's a huge problem with time travel

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Actually, there are many huge problems with time travel, such as the fact that nobody has the faintest idea how to do it, and even if they did, it would pose some interesting conundrums concerning the possible rewriting of history. However, just suppose that you were able to dematerialise right now and turn up again 100 years ago or in the future. Where exactly would you re-appear? Don't forget that Planet Earth is constantly on the move, not only orbiting the Sun but being carried by the Sun on a very long journey around the Milky Way. So when you popped back into existence you would not be standing on a solid planet but floating about in cold, dark space! Fortunately Dr Who does not have this problem, because her craft the Tardis is so called because the letters of the name stand for Time And Relative Dimensions In Space. As a time traveller you have get time and space perfectly coordinated to avoid ending up absolutely nowhere!