When the Earth orbits around the sun, relatively speaking, does it circle in the same path each time?
In: 184
You’ve very nearly stumbled upon the reason why I think time-travel is impractical, if not impossible.
If you look at the universe as a coordinate plain (disregarding the *z* axis for simplicity’s sake), everything is moving. Moving towards, moving away. Terra moves around Sol. Our solar system moves around the center of our galaxy. Our galaxy is moving, in relation to other galaxies.
If we were to plot our position on the cosmic coordinate plain, there would be no overlaps of your current position if indeed you could calculate to that small a degree on the cosmic scale. Even if you were to remain perfectly still, you would still be moving, in relation to the cosmos.
Furthermore, you would never be able to occupy the position you were at even a second ago Ever.
Even if we were able to somehow send ourselves “back in time,” the point in space-time to which we were going wouldn’t be under solid ground. That isn’t also assuming we calculated for all spacial dimensions, and that our concept of using 3 dimensions to calculate one’s position in space-time is tantamount to calculating weight using a hammer.
The destination at best would be empty space.
Tl;dr: No
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