What are the different theories of time travel? I am curious about time travel and only know a few of the many theory's and if anyone could help me I would appreciate it.

I know a very good theory. Its about time travelling to the future.... And its possible! You know how? Moving! The closer you go to the speed of light, the slower time passes for you. The slower time passes for you, the faster it passes for everyone else. This way you can travel to the future.

ok i have a thougth about timetravel ok


If time travlling was possible how cum some one from the furter anit visted us yet?

Some one from the furter anit visited us cuz the furter doesn't exist yet.

yes but if time tavle ever becum possbile how will they beble to travle to the futre? in that dont exist?

Travelling to the future is far different from travelling to the past, AND it does not happen the way you think. This is all assuming Einsteins theory is true, but it probably is, considering NASA used atomic clocks to test it, and it happened exactly how Einsteins theory predicted it would. The future doesnt have to exist for time travel to the future Einsteins way. It happens like this, the closer to the speed of light at which you move, the slower time would pass for you. To you, it feels normal, but everything travelling below your speed would look (to you) to be going by quite quickly. To them, it goes by normally and its you who are moving slowely (in an ideal world where they could observe you as your spaceship flies past them). What would happen is that you would would live lets say 1 day at the speed of light, you've aged 1 day, but everyone else not moving at the speed of light has aged say, a month. During the time you were travelling, everything went by quicker (and in essense, the future was written).

You cant change the past but you can creat time forks (as i call em)

Every thing has an infante possible outcomes

~Thanato

I don't beleive its possible, but if it was then I'd at least beleive changing time was impossible due to the fact they'd already have and done whatever in the past, therefore whatever they've done has already taken place in our timeline.

You believe time travel to the future is impossible? We're doing it all now!

You know what I meant

I dont know whether you mean time travel to the future too or just time travel to the past.

either so long as it doesn't count our current pace

Well, it may interest you to know that a pair of atomic clocks, which were synced on the earth, ended up unsynced when one was put on a space shuttle. It was behind the earth based one. This supports einsteins theory that time slows down as you increase in speed, and therefor, you're traveling into the future more by simply walking than by sitting, but in this case its so minute that its inconsequential. Its when you get to the higher speeds that it beggins to matter.

Thank you for all these wonderful theories, I really like the one about Einsteins atomic clocks and the faster you go, the slower you age.

This isn’t the best example. You are speaking of velocity time dilation, and the example you gave was gravitational time dilation.
The clock in space was moving faster than the clock on earth because of gravitational time dilation. The speed in question wasn’t sufficient enough to make this much dilation, and the clock in space was faster due to lack of gravity.

Was I? Opps. Sry. Eitherway, it doesnt change much.

Either way there is time dilation, I'm just being technical and giving you a hard time

If we bring negative energy or negative mass with us provided we are in zero energy, then we can go back to the past. We can do nothing at the past but looking, like watching TV. Cause any action will break the conservative laws, and there is energy barrier in front of you, like a transparent wall.

Seems nobody from the past or the future visited us. Assume Atlantis had no time machine. How about future? Either we don't have future after 2012, or after 2012 space time will change, thus produce a time barrier neither side can penetrate through.

Actually, the clock in space was slower. That is why it was behind the clock on earth.

As to Einstein's theory, we won't be able to really prove it until we can reach speeds that approach the spped of light. It is an interesting theory.

There are several possibilities:

1. It is possible but we never learn how to do it.
2. It is possible but the humans of that era take care not to interact with us, for fear of changing things in a negative way.
3. They have interacted with us without saying "Hi, I am from the future." As a result, we don't know about them.
4. It is only possible one way---Traveling into the future via Einstein's theory of relativity.

through the theory of relativity, we can travel in time but only in one direction and that toward the future (we would also need a technology that simply dosen't exist right now).

But maybe we will some day travel to a speed close enought to the speed of light, then we will be able to persive first hand the time travel effect.

i think time travel is possible, but luckily nobody has discovered yet because if they did we'd all be screwed

the only thing i know about time travel is that... you dont age at the speed of light, and scientiests having made a craft "or so we dont know that they havent" but its said you dont travel at the speed of light.

yes, thats right.

This is incorrect.
Mass acts like acceleration. The more the acceleration, the slower time moves. The stronger the gravitational field, the slower time moves. Atomic clocks on satellites tend to move faster because of a weaker gravitational field.
Gravitational time dilation has already been proven years ago, which is why atomic clocks have to be synchronized with GPS.

Are you sure? When I first heard about it, I heard that the clock on the shuttles ended up behind the one on the earth...

Yes I'm sure.
THIS SITE has an interesting explanation of time dilation, and explains it in layman’s terms.

THIS SITE get's more detailed, and since it get's confusing, I will quote a pertinent part:

Yep, I made a mistake.

hmm this is completely different to what im used to......
neway i was talking to some one about time travel and the word cronoclasm came up and a thread on this group matched so here i am

1 idea/theory i came up with is while it may be impossible for us to move our body through time we may be able to move our mind/information whats more it may have already been done look at the discoveries of our race/species we spent who knows how many years working stone then suddenly we work metal
many years with bows arrows and swords then suddenly we have guns now we may have been 'stuck' in these primitive states for a long time if the person/s who were responsible for the discovery of metal gunpowder ect died before they could "teach "us or we maybe have learnt though some one else at a later date
so sending information into the past would be like moving the past into the future because we already have learnt these things if we acidently change the past and wipe out a few scientists we could always teach some one else what they knew...something to think about

another one
some of u may have read a book called universe in a nutshell by stephen hawkings (i think thats the right spelling) well any way it makes a rereference to a theory that not only particles move from one place to another but they take every possible route to get there this means that we must have realities that cross ours in the present/future then curve back and cross ours again in the past before moving on if we could use these realities to travel in we could possible move forward in time to our past

and finally its widely accepted that moving at very high spends slows time relative to your/our perspective therefor we are moving in time to the future
doesn't this also mean if we slow down from our current velocity time would move faster and we we would travel to the past of some one moving at the original velocity?

The dimensions of height, width, and depth can all be traversed in two directions, but time works WAY different than any other spacial dimension. Example: you can travel up and down, left and right, near and far, but you can only go forward in time... or maybe both the directions of time "travel" through the same space?

I think Einstein was from the future or had some connection somwhere.
No one can just come up with such theories if we think about how long ago he came up with those theories.
I dont belive a man just can come up with such theories by just sitting and thinking.
Sense?
If you think about it?

purely scientifically speaking (and simplified) any 'time travel' hypothetically implied from Einstein's GRT (ie travelling at the speed of light) will not be for us mere physical entities possible....some stats...
70kg mass at 10g acceleration would take 35 days to reach the speed of light and it would take approx. 3,145,801,400 GIGA JOULES of energy to get ya there! Now consider all the fuel that has to be accelerated with you. Even if you had a nuclear reactor onboard your craft your chances would be very very slim indeed. Not to mention - HOW DO I SLOW DOWN AGAIN OR TURNAROUND! BTW, there are many more showstoppers to this hypothetical travel.

In my opininon and backed by scientific research (and hint of philosophy and logic) physical time travel will most likely NOT EVER happen

But, we ARE time travellers by nature. We travel from one moment in time to the next We travel in one direction - the future. Just like our past, our future is written. Our perception of our surroundings (sight,hearing,touch,smell - all) is already DELAYED. ie you are perceiving what WAS not what is - think about it, it's trippy

So I resort to pursuing non-physical time travel. No alternate universes, no paradoxes. I already travel into the past every time I remember a past event. I remember a future event - Deja Vu.

Can anyone debunk Nostradamus ? Any links ? Did he travel into the future (non-physically) somehow ? just interested...

First of all The theory of relativity doesn't permit time travel to the past.

Einstien made his theories by sitting down and contemplating what it would be like to catch up to a particle of light. Then he took his theory and made it into a mathematical formula, and studied the formula and how it related to reality. And then revise, think, revise, think, revise until finally the fruits of his labor produced special relativity, general relativiy, and indirectly quantum mechanics.

Wtf kaj, that is a pretty ridiculous thing to say. That Einstein probably from the future?! I think not. By your reasoning, that means any scientist who makes monumental scientific discoveries would probably be from the future- impossible because there would be no scientific advances in the present to add to their future world.
Hmmmm how else do you get theories? You don't need a time machine.

I am new to this site, and new to this information, and I must say that feel like an ignoramous, but I am really intersted in this topic.......question, so Einstiens theories could be proved by atom testing......how does atom energy mix in with time travel?

Also, I read somewhere that time moves in waves and that time can exist in two places at once......Is that false?

I prostrate myself before the genious minds before me and beg for thy wisdom...........Im such a nerd......hehehe.........

Basically, to travel forward in time, one must be in a vessel that can travel at the speed of light. Unfortunately, the only thing that can travel at the speed of light is a gamma ray, which is weightless. If anything with mass tried to travel at the speed of light it would rather spontaneously combust because of drag, or friction in the air. The only way I can see that this is possible is in a vacuum, and even then there are so many things that could go wrong.
Time travel is something I think is never going to be achievable, it exists in theory but nothing else. And if you think about it we're travelling forward in time with each second that passes.
Good thread
To soulstar_82 I am going to try an answer your question as best I can, apologies if it doesn't make sense.
Anything and everything mixes in with time travel, because to travel forward through time you need to travel at the speed of light. Einstein, because he was such a smart guy and all worked with very very small particles so that he wouldn't blow anything up, that's how I perceive it anyway, I might be completely wrong.
And I don't think time travels in waves...? It's a dimension, so that's like saying that width or height or length travels in waves, it doesn't travel...it simply passes by...if that makes sense.
*Senselessly rambles on in head for awhile longer* Does that make sense to anyone?

We can't travel into the past, but we look into the past by stargazing. When you look at a star 8 light years away, you are seeing 8 years into the past.
The Andromeda Galaxy is 2.5 million light years away. What we are actually seeing is an image of what Andromeda looked like 2.5 million years ago.

Sort of a visual time machine into the past!

If you ask me it is impossible. Why? We are always in the present. We are never in the past, or future. We have not made the furure yet becuase we are in the present. Same as going to the past. There is none, we are ALWAYS in the present. If we where to do that, why isn't anyone visiting us from today?
BUT people to believe aliens are future time travellers, us checking up on us so we are not doing anything dumb, crazy...ect

I agree.

We are always in the present, and we assume the future from the present which then becomes the past.

So, even if we travelled at lightspeed, and time slows down to a complete slowdown when you catch up with it.. you still would be in the present as we are now.. and we are travelling at a complete slowdown right now too.

BTW.. Nice point, Turbonium

but, even though we are always in the prenent, the future is already set to what will happen. I believe in destiny, and everybody has something they WILL do. But, you still have free will to choose and come upon that decision. You can choose whatever you want, but your destiny will always occur.

any questions? comments?

what does destiny have to do with time travel?

anything with mass cannot reach the speed of light, particle accellerators can get close because of the enormous amounts of energy they use, but its not like you can just keep on giving energy to a particle accellerator untill it finally reaches light speed, the energy required would be an INFINITE AMOUNT. Anyone got an infinite amount of energy on them? anyone? come-on people check your pockets.



As bill clinton would say "close but no cigar". You dont actually have to reach the speed of light to slow time down for yourself, in fact driving a car down the freeway at 60 does the trick(even though its a tiny amount.). Getting anywhere near the speed of light would decrease your motion in the direction of time, and increase your motion in the direction of the space you are traveling through. If you could reach lgiht speed time would no longer have meaning for you, you would forever(forever to observers not to you) be stuck traveling as a streak through the sky.

P.S. i am traveling through time right now!

I'll share this - We live in the present but we perceive variant relative past. This is a fact that I CAN prove. The perception of the beer glass in my hand is 'younger' than the perception of the horizon (and I'm looking at both - beer in foreground) and so goes for almost any other photon (feeling, sound, taste etc) that hits my person. The photons from the beer glass and the horizon have hit my eyes at the same time (and hence 'seen' in the one image produced or 2 for depth perception) but both have travelled different distances and ultimately one part of the image (the beer glass) is showing me what WAS a fraction of a second ago and the horizon part is eg. 1 second ago (but ultimately further into the past). BUT NOTHING IS PERCEIVED 'NOW' - simple, because perception itself implies passage of time (as we know it so far).

What is the point to this ? Well, in a nutshell, because we make decisions based on what WAS and NEVER (in reality) on what IS (no matter how miniscule the difference) because WAS (so very fresh because we are just perceiving it) is already written we make decisions on what WAS (blatantly obvious). There is no indecision - it's just an illusion. Our decisions will always be what will be - no matter what decisions we make.

Implications on physical time travel - not possible - what WAS cannot BE again to be replayed physically. What was, was and what will be, will be NOT what was will be and what will be was. Get it ?

Okay, I agree that it sounded stupid, but that is not the only theory he had.
He said that the "room" bends in big masses of materia.
Nowdays they are testing these theories and they seem to be allright
I dont know, but I think that is really incredible of a man that long ago.
No one had ever been in space even.
Mathematics? I really have a hard time believing that.
He knew nothing about the conditions there.

Just stumbled on this page by accident. It talks about different ways time travel is possible (with refs to SR GR QM) but NOT feasible. It's a little bit of reading but all of it interesting and backed (with references) to prominent physicists.

You may already know most of it but even so there are some great explanations.
Happy reading...

http://www.zamandayolculuk.com/cetinbal/ti...avelscience.htm

I particularly liked this limerick,

There was a young lady named Bright,
Whose speed was far faster than light;
She set out one day
In a relative way,
And returned on the previous night (Davies, 1992, p. 21)

Math is the language the universe is based on. If we met another intelligent race of beings, math would be the only way we would be able to communicate. Ofcourse whether they could figure out what we were doing giving them a piece of paper with seemingly random characters on it is a different story. They would probly do the same thing though, give us a piece of supermetal with a bunch of characters on it. And then they would fly off in their space-ship trying to figure out how we do math, and we would try to figure out their math... and then we would and the earth would soon become a charred mass of nuclear fallout. Then in a few days they would come back and take all our natural resourses... bast*rds

we'll figure out how to time travel before we land on our nearest star!

Who says we havent? Would we be welcomed? Or would we be feared?

Given that time is invariant, time travel to the past is impossible. The past isn't an actual location so we can't travel to it. One of the ways to "time travel" is through a form of space travel.