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Forums - General Discussion - Is time travel possible?

 

Why we have not seen time travellers?

Time travel is impossible 53 49.07%
 
Time travellers are hidden among us 29 26.85%
 
The world ends before it is invented 26 24.07%
 
Total:108
JoeTheBro on 24 October 2013

It is probably very possible, just pretty confusing if real.

 

If it is possible, it would probably mean the future, past, and present are set in stone. This means you can't time travel to the future, see our future mistakes, and come back to the present to warn us. Also means you can't go back in time and change things. Or not. Our understanding of time is pretty loose.

JoeTheBro said:

It's not possible.


Just showed you're wrong, future me.



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dharh on 24 October 2013

I believe you could move 'forward' in time, by bending space/time to such an extent that you slow down your own relative time compared to time in the rest of the universe. This is not really time travel, but from your own point of view, assuming you didn't die in process, time outside would be speeding up giving it a basic illusion of time travel.

But never backwards in time. I think there is a simple concept to describe why. The past no longer exists. Only the consequences of the past exist now.

At best there is the possibility of infinite possible universes that exist along with our own universe. If so, then there must be a universe that is the exact same as our own but at a different time along the shared 'history'. Maybe then you could find the universe the same as ours in the correct time you want and travel to it. Maybe. But probably not.



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Zekkyou on 24 October 2013
JoeTheBro said:

It is probably very possible, just pretty confusing if real.

 

If it is possible, it would probably mean the future, past, and present are set in stone. This means you can't time travel to the future, see our future mistakes, and come back to the present to warn us. Also means you can't go back in time and change things. Or not. Our understanding of time is pretty loose.

That's an understatement :P We aren't even sure if time exist in a form that can be traversed, or it's nothing but a series of results. If the latter is correct then you couldn't go back in time because it doesn't exist anymore, just the consequences of those events.



cyberninja45 on 24 October 2013
DarkTemplar said:

Times goes slowly when something is close to gravitational sources (like planets, suns, or even black hole) .

http://en.wikipedia.org/wiki/Gravitational_time_dilation

 

Also times goes slowly when something is moving fast. This is why time goes slower to the people that are on the space (they are moving relatively fast). And also why astronauts are considered the first time travelers (to the future), even if only for a fraction of a second.

http://en.wikipedia.org/wiki/Time_dilation

 

Finally, it seems that scientists did not reach a consensus about traveling to the past yet, but there are several hyposesis about this in discussion ritgh now. For instance, some scients believe that even if we cannot go to the past, at least we can send a message to the past (given that in the past, some one has a machne able to recive the message).

This is always something that interested me with regards to time dilation, it always due with respect to the speed of light. So the faster we move, or the closer we get to the speed of light, everything thing else seems to slow down. This in mind shows that every "moment" cannot take place faster than the speed of light but is that truly time.



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Porcupine_I on 24 October 2013

Of course time travel is possible, i travel into the future since i was born!



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cyberninja45 on 24 October 2013
Troll_Whisperer said:
Time travel happens all the time. Time is not set in stone. Because of relativity, objects at different relative speeds experience time differently, that's why GPS satellites don't work with ordinary clocks, they need to be adjusted accordingly.

We can travel to the future by approaching the speed of light, that makes our time go at different rates compare to other objects or beings. Light itself doesn't experience time, the moment something makes a photon and the moment that photon becomes something else (heat) are the same very moment from that photon's perspective.

Travelling back in time is another matter though. Perhaps it's theoretically possible when surpassing the speed of light? But that can't be done so I don't think travelling to the past is possible.

So you are saying the speed of light is the fastest possible factor a moment can take place. So in a way time is like a roll of tape per say unwinding at the speed of light if we were to observe it from out ide the universe.



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cyberninja45 on 24 October 2013
Viper1 said:
Even if time travel were possible, there would be one major quirk in the works that would pretty much kill anything that did.

Any and all transitions from one time period to the next (such as what happens to us constantly anyway) is accompanied by a physical change in location. By that I mean the Earth is constantly moving along many different vectors - rotation on the axis, around the sun, around the galaxy and through space itself. In relative terms, we're moving about 850,000 miles per hour - nearly 400 km every second.

That means that wherever in time you travel to will be in the middle of a vast empty void millions to billions to miles away from Earth itself.

The only way to compensate for the change in location would be to have some means to not just travel in time but through space with incredible accuracy and at speeds well in excess of light. Unfortunately you'd also attain infinite mass and turn into a black hole thereby destroying Earth upon arrival.

But if at somepoint we were actually able to invent a time travelling machine I suppose we would also have the technology to calculate the coordinates of the the earth in space at that particular point in time. It should be an easy hurdle to over come.



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1337 Gamer on 24 October 2013

Not possible. Time moves at the speed of light. Its impossible for anything to move faster than light.



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think-man on 24 October 2013

Yes, Look at my age and just believe me.



 

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Zappykins on 24 October 2013

Yes, probably and I will tell you yesterday.



 

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