Is time travel possible?

Originally posted by Admiral Akbar
I forgot where I heard this, but a group of scientists stripped an electron from an atom and shot it in the opposite direction that the earth is spinning. They performed this experiment to try and prove that you can travel back in time. So anyway only after a mere few seconds I think it was 6-7 seconds the electron stopped spinning and ended up back inside of the atom.

If that had really happened (ie, an electron going FTL and back in time), it would've been major news. At best, there was likely a perspective factor involved, like with "superluminal" jets...
http://72.14.209.104/search?q=cache:-h4ZtFlh0hEJ😖cience.nasa.gov/newhome/headlines/ast11jun97_1.htm+superluminal-jets&hl=en&gl=us&ct=clnk&cd=2

Past is past because it already happened, what happened in the past... is that way because it happened that way. I mean, if it was possible to change the past(by travelling back in time), then it wouldn´t be past anymore, as just by experiencing that past we would be changing it.

For example, choose a moment in the past you would like to travel back in time. At that time you have choosen, you probably weren´t there observing events as a time traveller(specially if you choose a time where you were not born yet). Thats why it is impossible to go back at that time, you weren´t there as a time traveller, if you go back there you would be indeed a time traveller observing events, and there was not any time traveller observing events. In other words... you cannot go back in time and kill yourself because you were not killed before, you cannot go back in time and kick Hitler because he was not kicked by you before.

Resuming... time travel is not possible because you can´t interact with it in any way as you would be changing it. The problem is not only the laws of physics... logic itself doesn´t allow time travelling.

I saw an interesting time travel paradox one day in a book, saying that it would be possible for you to be your mother, father and son of yourself at the same time if time travelling was possible. It is a long history, but basically it is that you could be initially male, find a woman and have a child, then in the future you change your sex, go back in time, find yourself, and have a child. That child could be you, there is no restrictions for that, but remember time travel is logically contradictory so its no surprise a situation like this one would be possible.

Originally posted by Admiral Akbar
Yeh, relating to my post, they shot the electron 3 times the speed of light.

Never heard about that, but if an electron has 3 times the speed of light, it must have imaginary mass, and imaginary energy. It is not possible to measure an electron that behave like this. A electron like this doesn´t interact with our universe in any way if I am right.

Time travel is possible if not almost beyond doing.

Make a wormhole and place one end on a space ship that will travel on a loop for 20 years at near the speed of light. When it returns you will be able to step through the wormhole back 20 years to when you made it.

Originally posted by Gregory
Time dilation is not time travel.

As a matter of fact it is. It's merely time travel to the future, for the object travelling fast enough.

We're ALL travelling through time right now, we can't STOP time. But an object moving close to speed of light will experince time dilation relative to us at rest on the Earth, and hence travel into our future.

Originally posted by Admiral Akbar
Yeh, relating to my post, they shot the electron 3 times the speed of light.

Ahem! Who did that? I dare the postulate that NO such experiment took place where an electron travelled 3 times the speed of light. References, please.

Originally posted by Shakyamunison
Time travel is possible if not almost beyond doing.

Make a wormhole and place one end on a space ship that will travel on a loop for 20 years at near the speed of light. When it returns you will be able to step through the wormhole back 20 years to when you made it.

Huh? I am sure you mean... Take a wormhole. Accelerate one mouth relative to the other, so they will be at different times in space. Now let a spacecraft travel through this wormhole, and it could technically travel to the past.

(What do you mean "travel on a a loop for 20 years"????)
Wormholes are a consequence of Einsteins equations, and this far, everything that these equations have predicted have turned out to be found. The problem with time-machine wormholes is, that it seems the wormhole will collapse if you try to turn it into a time-machine. Causal chaos so to speak...

Originally posted by The Omega
As a matter of fact it is. It's merely time travel to the future, for the object travelling fast enough.

We're ALL travelling through time right now, we can't STOP time. But an object moving close to speed of light will experince time dilation relative to us at rest on the Earth, and hence travel into our future.

Ahem! Who did that? I dare the postulate that NO such experiment took place where an electron travelled 3 times the speed of light. References, please.

Huh? I am sure you mean... Take a wormhole. Accelerate one mouth relative to the other, so they will be at different times in space. Now let a spacecraft travel through this wormhole, and it could technically travel to the past.

(What do you mean "travel on a a loop for 20 years"????)
Wormholes are a consequence of Einsteins equations, and this far, everything that these equations have predicted have turned out to be found. The problem with time-machine wormholes is, that it seems the wormhole will collapse if you try to turn it into a time-machine. Causal chaos so to speak...

I don't know, just pure theory. If you could do that to a wormhole without it blowing up on you, then you could go back and stop the ship from taking off. 😱

I really don't think it can be done. There is no past or future, just now.

in a way it is possible already...it known for a fact that time goes by more slowly the further you depart from earth into open space..so it's some kinda time travel

Originally posted by RogerRamjet
in a way it is possible already...it known for a fact that time goes by more slowly the further you depart from earth into open space..so it's some kinda time travel

Where did you get THAT idea from?
The rate of time does NOT depend on how far away from Earth you are. It depends on the relative speed with which you travel.

Well, I don't think it ever will be. If it was possible and discovered in the future think of this...

If it was ever possible, presant or future why is it that no one in the future with half a brain in their head hasn't come back to the past to give us the technology. With THAT technology here now we can improve on it in this time so it's more effective then.

Originally posted by The Omega
As a matter of fact it is. It's merely time travel to the future, for the object travelling fast enough.

We're ALL travelling through time right now, we can't STOP time. But an object moving close to speed of light will experince time dilation relative to us at rest on the Earth, and hence travel into our future.

Ahem! Who did that? I dare the postulate that NO such experiment took place where an electron travelled 3 times the speed of light. References, please.

Huh? I am sure you mean... Take a wormhole. Accelerate one mouth relative to the other, so they will be at different times in space. Now let a spacecraft travel through this wormhole, and it could technically travel to the past.

(What do you mean "travel on a a loop for 20 years"????)
Wormholes are a consequence of Einsteins equations, and this far, everything that these equations have predicted have turned out to be found. The problem with time-machine wormholes is, that it seems the wormhole will collapse if you try to turn it into a time-machine. Causal chaos so to speak...

Refrence? Saw it on the Discovery Channel. Err they somewhat briefly explained it. I cant remember complete details.

Originally posted by Admiral Akbar
Refrence? Saw it on the Discovery Channel. Err they somewhat briefly explained it. I cant remember complete details.

Well, I can assure you that matter-particles like electrons can’t travel faster than the speed of light. It would’ve been ALL over the news if that had happened – EINSTEIN DISPROVED and stuff like that.
You MAY be thinking entanglement-experiments?

I have no diea lol. I just heard what I heard on Discovery Channel. Anyway I read somewhere I think it was wikipedia that if something goes more or faster than the speed in light than it will actually go back in time instead of into the future, or maybe that just has to do with wormholes.

What are entanglement experiments?

actually einsteins theory states that if u achieve light speed u will have attained so much mass that u will have absorbed the entire universe, since to move u need mass and to move faster u need more mass

but what i dont get is: light moves at light speed... and it doesnt eat the universe. so if u configure different masses into beams of light u will achieve lightspeed, then u have to reconfigure, HOWEVER u will never be able to go faster than the speed of light.

so all in all, no i dont think it is possible

Originally posted by ðµhµl gê†ñåh
actually einsteins theory states that if u achieve light speed u will have attained so much mass that u will have absorbed the entire universe, since to move u need mass and to move faster u need more mass

but what i dont get is: light moves at light speed... and it doesnt eat the universe. so if u configure different masses into beams of light u will achieve lightspeed, then u have to reconfigure, HOWEVER u will never be able to go faster than the speed of light.

so all in all, no i dont think it is possible

Photons, which are the quanta ("particles"😉 of electromagnetic radiation (which includes light) are said to have a rest-mass of zero, this in contrast to particles of matter (eg, a proton), which have a rest-mass >0. This is the crucial difference which allows light to move at cee (lightspeed); indeed, dictates that it must move at that speed, in accordance with the laws of physics.

As for "reconfiguring" matter into electromagnetic radiation: that is one of scifi's common explanations for teleportation, similar to Trek's. Thus, to "reconfigure" would require a knowledge base and technology beyond the boundaries of our current know-how.

Admiral Akbar ... Entanglement means, for example, if you have 2 photons created together, then they zip off to different parts of the universe, if you affect photon A in some specific manner, photon B will change in a way that reflects what you did to photon A (the change determined by laws of physics). But most crucially, photon B will "know" what happened to photon A "instantaneously." Einstein called it, "spooky action at a distance."

Yes, I'm from the year 6349.

Originally posted by Aziz!
Yes, I'm from the year 6349.

You are out of your mind, the world is destroyed 3521. 😱

Originally posted by Shakyamunison
You are out of your mind, the world is destroyed 3521. 😱

The world, not the universe. Humans live on different planets in my time. I got sucked into black hole. My force field on the ship kept it from being torn apart. Instead I got sent here.

Originally posted by Aziz!
The world, not the universe. Humans live on different planets in my time. I got sucked into black hole. My force field on the ship kept it from being torn apart. Instead I got sent here.

Ahhh you are one of the forbidden one. We will get you. 😱

😆

Originally posted by Shakyamunison
Ahhh you are one of the forbidden one. We will get you. 😱

😆

*grabs plasma pistol* I don't think so.

Originally posted by Aziz!
*grabs plasma pistol* I don't think so.

So do you really think time travel is possible?