Reply #22: The old problem with traveling through space-time and not just time itself.

[JTG of the PRB]

A very tricky problem to get around. That would require even more in-depth calculations and an even greater energy expenditure.

The slowing of time as you approach the speed of light is interesting. Technically it would create the passage of time, though for anyone in a vessel traveling near the speed of light time for them would slow down - in the rest of the Universe time would remain constant. So the supposed time travel would be more of an illusion of the passengers in the vessel, and not an actual travel through time from Time Point A to Time Point B. Very interesting though...