Will Time Travel ever be possible?

J

jonletter

Temporal Novice
If so then why have we never met anyone from the future? Or maybe the TTs have a strict code of rules that they are ordered to follow such as never telling anyone. Or maybe we destroy ourselfs before we invent a time machine.
 
yes. if we do not destroy ourselves first and TT is possible, then I'd have to say its a good argument for a singular timeline and the butterfly effect. For a TT to alter anything in the past may erase their own existance.

or, the technology is strictly controlled and not in general use for fun and games. It may be such that the use of such a device would create a measureable time/space signature much like a thermonuclear explosion. Since the use of a TT machine could be traced, any rogue or unauthorized use may be eliminated by a controlling power.

or, maybe the way the universe works is such that our timeline is the first/original line, and that any future TT machine would only bring users back to alternate/parallel timeline, but never the original, or base timeline. Since a TT machine has not yet been created, there has not been any TT so far.

or,...
 
I hope that you can't physically change the past/future. Otherwise someone would have sent me a million $ by now.

But I do think that someday technology will let us LOOK at any point in time/space. So aliens and humans from the future are checking YOU out right now.


Everyone wave!!!


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jon.

If so then why have we never met anyone from the future?
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Here's one posssible answer:

Time travel, as we generally conceive of it, involves warping spacetime into a closed loop such that as we move "forward" in time we run into the "tail end of the loop" - the past. The metrics involved in the loop state that the loop was formed when the machine was activated. The machine then moves forward in time. The only way to travel far into the past is to activate the machine and leave it on for a long period of time. For example, you activate the machine, let it run for 50 years and get into, on or walk through it (however it is designed) and appear on the other side 50 years in the past. The loop only leads back to the time that the machine was activated.

Therefore, why do we see no time travelers? Because no such machine has yet been invented thus no such machine has been activated in our local time.

In this form of time travel (and we really don't know of any other, really) one can't travel into the past to any arbitrary period of history. The limit is defined by the existence and activation of the machine.
 
I was watching BTTF


OK this is impossible I will tell you why I was watching back to the future and in it where they go too 2015 and Marty sees his daughter and son well this would be impossible heres why .

He left 1985 and didn't live between the year 1985-2015 so seeing he didn't live through that time and skipped into the future he would not have had sons and daughters and would of been just missing.

So see that you can't go back before you were born either because you didn't exist yet so that would be impossible too.



Just a few more things too add from BTTF 2 you can't go back in time with stuff from the future and bring it back before it existed Like the Hover board or even the Delorean so the whole BTTF trilogy is booty But I still love time travel movies shows and books even if you can't do it.


My favorite is when star trek goes back into time or does something with time those are my favorite episode.

Then there are Quantum Leap, Voyagers, Time cop, Time Trax, 7 days, Tru calling but I am not sure because she only repeats 1 day, Doctor Who, The Time Tunnel,

But I do have a theory on Deja Vu that's pretty good.

Deja Vu is when you thought you relived a moment or was at the same place before.

What if it's that you were reliving those moments before at the same time.

When you live your life you do things then you get too the end and die what if when you die you get reborn as yourself and it's your own personal loop and that's why dejavu feels so real because you actually did live that moment before.

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If so then why have we never met anyone from the future? Or maybe the TTs have a strict code of rules that they are ordered to follow such as never telling anyone. Or maybe we destroy ourselfs before we invent a time machine.
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This is the first fault of many a man. Time travel is not specifically limited to sending a physical form back in time. There are many other possible ways one could modify the chain of events.

Information sending (send information back to earlier self).
Method enhancement (keep looping a series of events until you reach the desired state).
Spectral Return (on death, you return back to when you was born, with little or no knowledge of events).
Temporal Time Paradox (a series of events self-created that trap you in a time-loop that keeps you alive forever by resetting the events).
Simulated Foresight (foresight into future events based upon specific information that is simulated faster than 'real-time').

For all this is, we could just be sitting in one of the many time-lines where time travel cannot occur. What begs the question is that, does one of many time-lines apply to everyone, or does everyone have their own timelines which are independant?
 
Yes, to a large degree. That idea is one of the principle axioms of Special Relativity.
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Then, it's time for everyone's brain to ache!

Say one person's timeline moves faster than another person's timeline. You might argue that the first person could warn the second person of impending doom. However, this would not be possible as the first person perceives the person already dead, but the second has yet to experience it, and has yet to die.

Now here's the twist. Say the first and second person both have the ability to foresee, but live in two different timelines where two different (predicted, or foreseen) events occur. The first person foresees an explosion in a cafe. The second foresees the explosion being foiled. By which timeline would be proposed correct?

Now, to make your head spin. If the first person is the correct one, then the second person has the same timeline as the first, undermining the independent side. If the second is correct, same hoo-har. If the first person experiences a timeline where the explosion does occur, and in that timeline an alternate version of the second person does not foresee (or does, but is incorrect) exists instead of the one that can, then that would mean there is a single timeline for everyone still.

Now at this point my brain is trying to switch itself off. If a timetraveller travels back, stops you destroying your PC and disappears back, are you a part of his timeline, or his he a part of yours? If it's all singular and consistant (one timeline for all, that is always consistant), then what would have happened if he hadn't stopped you destroying that PC? Would that be a part of the same timeline? Or it's own seperate one? If it's seperate, does it apply to everybody still? But how could multiple timelines exist that affect everyone, but don't somehow cancel each other out (one stops the other from occuring, remember)?

Rather than giving my own point on this, I want some to hear some theories. This is an interesting and braincrushingly twisted question.
 
Say one person's timeline moves faster than another person's timeline.
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Again, this idea is one of the principle axioms of Special Relativity. The rate that time flows is determined by your velocity relative to some other observer's velocity. There is no universal time frame.

If you can't remember anything else about Special Relativity remember this: there is no universal time frame. The notion of a universal time frame is nonsense according to Special Relativity. The rate that time flows is a function of your velocity relative to some other observer's velocity. If you have 50 observers all moving at different velocities you will have 50 clocks running at different rates.

Sure, under what we know to be normal circumstance, circumstances where objects are moving at very low velocities WRT the speed of light, time passes at about the same rate for all observers. But the operant word there is "about". It doesn't pass at the exact same rate for observers who are moving at different velocities. For example, if you have a clock here on Earth and your pal has an identical clock on his ship that is moving at 86.6% the speed of light, his clock will be ticking at half the rate of your clock. This isn't just limited to the clock. The clock is just a piece of technology. Every physical process on that ship will be "ticking" at half the rate of the Earth-bound observer. This means nuclear processes, atomic (chemical) processes, thought processes - all processes. Of course, your pal on the ship will not notice anything unusual going on. S/he won't have any clue that time is moving at any rate other than the "normal" rate. That's because nothing unusual is occuring on the ship any more than what occurs when you are driving in your car past the people sitting at a bus stop. Because you're moving faster than they are your clock is running a bit slower than their clocks.
 
However, you've not addressed the issues that occur. In order for Person A to interact with Person B (without any conflict between both) they need a universal or common link. Even if they move faster or slower, the same thing will happen (thus denoted there is still a common link in the continuum of time/chain of events). If you catch me, it's kinda contradictary - people have different timelines but share the same chain of events. IE Two people have video players with different speeds on, but watch the same movie.
 
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