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This is a discussion on Daydreaming about Time Travel within the INTP Forum - The Thinkers forums, part of the NT's Temperament Forum- The Intellects category; Originally Posted by mickyj300x I tried imagining alternate pasts once or twice. But then I realized how much different everything ...
Personally, I'm of the camp that believes every choice anyone makes ever creates a separate time line. In other words, time isn't just a straight line. It's like a super complex tree of infinite branches.
So going back in time and changing something wont affect the people where you're from. Instead, you'll travel to a different branch where what you did had already happened. You'll simply stop existing in the old branch. Maybe you'll be replaced by another version of you that did something to cause the world to be like it is, or maybe you'll just be gone forever.
I'm going to stop myself here. I always get headaches if I let myself try and figure out all the possibilities.
^ Logically sound, but there is no reason to suppose that the other timelines have to "exist". Think Schroedinger's Cat.
And Schrodinger's Cat was more aimed as a thought experiment to explain the weirder quantum stuff. It wouldn't work with a cat because the cat is observing itself.
First off, a key (I'm going to try to make some sort of picture to help explain):
O = Earth
| = Light
: = Light from when you originally left Earth
/ \ = 1 day on Earth marker (alternates between / and \)
- = You
(Days on Earth will be counted as 3 lines of light, the third line being the marker)
Now, when you originally travel away from Earth at a speed close to light, let's say that you look out of a window in the back of your ship. It will seem as if time has slowed down, but really, you can't trust your eyes. Your eyes work by taking in light, but if you're travelling close to the speed of light, you'll just be moving alongside beams of light slowly passing you. This would cause you to see very little to no difference when you look at Earth.
[Day on Earth: 1 Day on Earth from your perspective: 1 ] O-
[Day on Earth: 2 Day on Earth from your perspective: 1 ] O||:-
[Day on Earth: 3 Day on Earth from your perspective: 1 ] O||\||:-
[Day on Earth: 4 Day on Earth from your perspective: 1 ] O||/||\||:-
What I'm trying to depict in that picture is simply that you're moving alongside the light.
Now, once you turn around and start heading back towards Earth near the speed of light, though, you'll see the light that was originally travelling behind you speed by you as you speed back towards Earth. I believe that time would almost appear to "fast-forward" as you travelled back to Earth until you finally make it back. This would be because instead of travelling alongside the light like before, you would now be travelling in the exact opposite direction of it causing it to speed by you as you speed by the light yourself, thus catching you up to Earth's time.
[Day on Earth: 5 Day on Earth from your perspective: 2 ] O||\||/||\-||:
[Day on Earth: 6 Day on Earth from your perspective: 4 ] O||/||\-||/||\||:
[Day on Earth: 7 Day on Earth from your perspective: 6 ] O||\-||/||\||/||\||:
[Day on Earth: 8 Day on Earth from your perspective: 8 ] O-||/||\||/||\||/||\||:
So I hope I didn't fail too much trying to explain that, though looking back at the "pictures" I made, it looks rather confusing. Regardless, the point I'm trying to make is that I believe that time is all about perspective. Take distant supernovas, for example. We know that they happened a very long time ago, but the light is just now reaching us. That doesn't mean that we're in the future or that supernova is in the past, does it? Light is our only means of deciphering time and with such a vast universe, it just isn't possible to create a single "here and now".
I'm going to stop before I begin to ramble, but I'd also like to say that I believe that time is completely set in stone, you aren't going to the future or to the past. I mean, really, it was thought up as a convenience. The idea that it's possible to manipulate something created in our minds is pretty absurd, in my opinion.
Also, one last thing. Sorry for any run-on sentences if there's any left in there, I'm horrible about those lol.
You think it's really possible? Interesting.
I think I might have done it, travel in time in dreams. Some quite overwhelming. Guessing if it's possible to do such a thing, maybe that's why I haven't been able to remember hardly any dreams for eons.
get out of my head lol. By that i mean, what if i were to able to re-live my life from birth (scary thought) with the knowledge i've acquired in this lifetime?