Time travel

[oxygenuk]

first off, hi.

 

im new here today

 

my question is will time travel one day be possible and will we see it in this lifetime or wont we be around to experience it?

 

all i think we need is the best nasa scientists in the world a few more other scientists, the best mechanics in the world and the best mathmaticall genuis' in the world

[insane_alien]

you can "travel" in time but only forward. if you go fast, like 0.9999999999c and go to the nearest star and back (assuming instantaneous acceleration) just over eight years would pass on earth while it would be a few hours/days or so for you.

 

you can't go back and thats the problem.

[Xyph]

If wormholes are possible and there are no universal laws of chronological protection, then you could travel a little way back in time. You have to remember, though, that a universe in which time travel was possible would potentially be in constant temporal flux until it reached a state in which time travel wasn't possible.

 

So if you ask me, time travel probably isn't and will never be possible, at least not while we're stuck in one universe. It doesn't bother me, though. Acausal universes are messy.

[oxygenuk]

doesnt the solar system have some kind of thing so its possible to go back in time?

 

for example, us humans have brains to think back to 1990 or something, so does the solar system have something similar so technology like time travel could connect to that?

[Xyph]

No. Remembering isn't anywhere near to being able to go back to that remembered time. Events of the past have left their imprint on everything, the solar system included, but that isn't going to make it any easier to get back to the time when such events occured.

[AI_Interface]

So far there are no know physical laws that contradict the possiblity of time travel either future, past or present oriented. Some physicist have sited paradoxes like the grandfather paradox as proof that time travel as possible (in my opinion the multiple-worlds interpetation of quantum mechanics solves this problem) however others have come up with some rather creative solutions. For instance, a carfully plotted course around the event horizon of a spinning black hole would bring you back to the moment you left. an important aspect of time travel is that you can't go farther back in time than the moment when the time travel decive was created.