Well, I'm glad we got to the bottom of what's unrealistic about traveling back in time...
Time and space are pretty much linked so if you travel in time you can travel in spacetime :)
Yeah, but to my knowledge, you can only go forwards in time.
What you can do, is go forwards at a slower speed. So, if you sat yourself in a spaceship and accelerated to e.g. 10% of the speed of light, you might get out after what you perceive as a few years and find yourself in the year 2200 (I did not do the math), but you cannot go back from there.
Causal chains always have to follow causality. They can just do so less quickly, because, as far as my current understanding goes, the speed of light is actually the speed of causality.
(Sorry to bonk you with so much physics. I know that initial statement could have also come from someone who's never heard of the theory of relativity...)
The bitch is figuring out a the spatial point of reference.
I don’t remember the name of the novel, so somebody help me with this. The concept is basically that scientists invent time travel, but use it as a teleportation device instead. Set the machine by a few seconds, you teleport the distance covered by the Earth during that time. They even use the technique to plan for an assasination of Kim Jong Un. Loved that one. Some innovative sequences using the ‘time machine’.
Edit: Found it. It's actually two books (original and sequel).
Split Second - https://www.goodreads.com/book/show/26216031-split-second
and
Time Frame - https://www.goodreads.com/book/show/37946554-time-frame
The first book takes its time revealing the 'time travel', but the second book dives head first into using the technology proficiently.
Accidentally read the second book thinking it was a stand alone. The story still held up so i made it half the book before i realized my mistake
It’s actually marketed as a standalone sequel, so you weren’t too far off. Plus I think the first one was more of an action thriller than about this invention. I actually don’t remember much from the first one. Most of what I remember is from the second one.
I hope there is an audiobook of these, sounds right up my alley
Same spot relative to what? What object do time machines use as a reference for their coordinates? It would make sense to be Earth, so it would be in the same spot all the time.
Weeeeell, not exactly.
It is true that things are all relative to each other. But think about it this was, if you fly out in a Starship in one direction for a light year, then turn around exactly 180 degrees and fly back, you wouldn't arrive back at earth, right? Mainly because things are accelerating due to gravity. And acceleration breaks symmetry.
It would of course depend on how time travel works, but since time and space are linked, it wouldn't be unreasonable to assume that you follow the same trajectory in space as you move through time. But that would be a straight line in the space+time dimensions still. Think of the paths in Minkowski diagrams.
In this case, it makes sense to time travel from space and land on a planet upon arrival. Maybe all UFOs are just time travellers after all?🤔
The time machine inventor forgot that things move.
Yeah, time travellers are pretty one dimensional smh
Weak premise considering the principles of relativity, and how our current understanding of time travel is basically rooted in SPACE-time.
Yeah, the earth IS in the same place all the time relative to its own frame of reference.
which makes you wonder what frame of reference would be used when you're time traveling to decide what location you go to
I always assumed that teleportation would need to also be present for time travel. Clearly, just an assumption.
Nor the solar system, nor the galaxy, nor the universe
But would they be skeletons?
If they were orbiting a star for long enough, maybe. (Long enough = thousand or millions of years) Maybe a skeleton in a small cloud ?
nah - freeze dried corpses
Nice one 👌
It's amazing how plausible this is
*any time
Since the universe is expanding.
Semi-relevant Tom Scott (actually about teleportation, but covers many of the same problems)
Teleportation is time-traveling as it allows you to be somewhere faster, change my mind
I agree, you have to time travel to travel faster than light no? (my understanding of physics id very elementary)
Well you can always orient yourself relative to the aether /s
Wouldn't gravity keep you on earth as you are traveling through time?
From what I understand, you blink out of existence when teleporting; you have no physical form until you reappear. So gravity can't act on your non-existent physical form, just on your body before and after teleporting.
Not just in orbit but also space in general.
You mean to say you think we figured out time travel before figuring out how to create a spaceship? Oh no If one we learned how to create a vehicle capable of moving in space faster than the earth moves..... Oh wait we have
