Well, since no one bothered to create a savepoint, we can't travel back in time anyway.
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Ahummm, well actually, * adjusts monocle * time travel is not possible and since nobody has invented time machines yet, neither of these scenarios would happen in reality.
I'd like to believe that mass (and then by extension the Earth) "defines" the spacetime around it as much as it distorts spacetime near it. I suspect this may even be the underlying cause for the observation of speed of light being constant in the presence of earth/solar/galactic movement.
When I was a kid I thought that spacetime was created by mass. I thought that if you were to ever find the end of the universe you wouldn't be able to travel beyond because you would just create new spacetime everywhere you went.
And I thought that was scientific consensus. No idea where I got it from, though.
My view has always been that space is "round", that there is no end of the universe because it just loops back around. Apparently this is all still unknown.
So either we would have to invent teleportation along with time travel/ have some sort of "magnet pad' that must exist and not break at all times on earth, or its the time machine type where it just fast forwards everything around you until somehow you're in a mall
Maybe this is why Stephen Hawkings time travellor party never worked out lol
I should hope that if we had time travel landing pads, we'd have a pretty good log of maintenance times in the future.
The tough part to figure out, though, is that the more a pad is used, the more maintenance it requires, which in turn modifies the logs.
That's why you need a T.A.R.D.I.S.
This. I like that Dr who actually has had this problem in universe. I don't recall the episode, but he went to earth and ended up at the right time, but not the right place, since you know, earth is moving.
Even if you were to use the sun as a reference we orbit the sun (relative to the position of the sun) at some incredible speeds. Time of day factors in, since we're rotating rather fast as well. So getting the right coordinates in space for a particular day, and a particular time in a particular year, for a specific place.... Well, good luck.
Which isn't to mention the fact that we're in a galaxy, which is moving as well, so using a point of reference outside the solar system becomes insane to try and calculate; which is what you would have to do in order to enable travel outside of our solar system with something like a TARDIS.
This is why you have to calibrate your time machine to track the relative gravity well.
I once saw a short film where this was taken into account: they moved back in time a few hours and ended you a few miles away too
Same as "7 days", they had to take the location shift into consideration.
Nah. Location is relative.
the question is, what's your frame of reference? if it's the earth you're good. if it's the sun, you could presumably move forward any integer number of years because earth would be in the same place in its orbit relative to the sun (but try to move forward by a year and a day and you may have a bit of a chilling discovery about orbital mechanics). however, the position of our solar system (which, you'll remember, includes the earth, the sun, me and presumably also you) is not static relative to the rest of the universe so if that's your frame of reference then you'll have to move in space and time instantaneously in order to move in time but seem stable in space to an observer whose frame of reference is the earth.
It’s my belief that Time Machines aren’t immune to the effects of gravity. When time changes, the machine goes to the space it would be at if it was affect gravity for the whole time.