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In how many directions can time move?

  1. Feb 6, 2010 #1
    Question above. Also, do you imagine time as a substance inside space, or, like a consequence of distance? How do you think of it?
  2. jcsd
  3. Feb 6, 2010 #2
    Time does not move.
  4. Feb 6, 2010 #3
    Was looking for a more helpful response
  5. Feb 6, 2010 #4
    In physics, it is assumed that all processes of nature take place in a four-dimensional spacetime. In this spacetime it is possible to measure lengths in all directions, e.g. in the time direction. As a consequence of relativity theory, what is measured by one observer as a length in the time dimension, will by another observer be measured as a length in both time and space, if that second observer is moving relatively to the first observer.

    So time itself is a dimension of spacetime, not something that is described as a quantity that moves in some other space. Although I wouldn't be surprised myself if in the future it turns out that time and space must be described in a different manner than it is today in order for physics to explain the world around us.

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