In essence how does time travel relate to space?

AI Thread Summary
Time travel could theoretically allow someone on Mars to observe their past self traveling there, contingent on discovering the correct method of time travel. The discussion highlights the complexities of faster-than-light (FTL) travel and its implications, particularly through Lorentz transformations, which suggest that one could arrive at a destination before departure. However, this concept raises significant concerns regarding causality, which is a fundamental principle in physics. The conversation also touches on quantum entanglement, suggesting it may challenge traditional notions of cause and effect by allowing instantaneous interactions. Overall, the relationship between time travel and space remains a complex and debated topic in theoretical physics.
neugie92
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So basically if you were on Mars, you cool look back and see yourself traveling to mars?
 
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With the right way of time travel (if this is possible), this would be possible.
 
If we could just figure out the "right way".
 
mfb said:
With the right way of time travel (if this is possible), this would be possible.

I'm confused into how this theoritically would be possible?
 
I think that was mfb's point.
 
If you assume FTL travel and applied your lorentz transformations you would find that you arrived at your destination before you actually left and you can visualize this better if you plot it on a space - time diagram. It is however a violation of causality.
 
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isnt causality actually brought down by quantum entanglement which effect its been verified to be instantaneous happening cause and effect at the same time?
 
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