• Time Travel, Possibility or Fiction?
    337 replies, posted
[QUOTE=paul simon;32761695]I don't think something in the universe constantly saves "states" of the entire universe so that we can access "the past" by travelling to it. Where/how would these states be saved anyways?[/QUOTE] Alternate/Parallel Universes. I think that the only way for backwards time travel to be possible, would be if there were parallel universes that you went to when you time travelled that were slightly behind. It would also mean you could kill your younger self without disappearing and a lot of stuff.
If time travel is or ever will be possible, where are there no time travelers walking around the Earth today from the future?
I've concluded that it would be possible if there was a machine that could take a snapshot of all particle positions and another machine that could arrange all particle positions. This would of course be [B]impossible [/B]for obvious reasons, but my argument is essentially that all a time machine would be doing would be rearranging particles to a previous state. I'm in the works of writing up a piece that goes into the details of this. I also get a bit into the idea of alternate universe, though I've only been using this phrase because I'm not sure what would fit. I try to define an alternate universe as any arrangement being outside the probability. A way to think of it is any arrangement that could not possibly occur within the past timeline would be a creation of an alternate universe. What if the particle arranger randomizes all particle positions. That would obviously not be within the same scope of the same universe we are currently we living in and in my definition of the word would be an alternate universe. If you were to take a snapshot of last week and go back then, but manage to include your current self in this, that would also be going back into an alternate universe. This is harder for people to agree with, but I'll make the point more clear in the piece I write up. I don't at all keep up with this kind of stuff so my thoughts may be old, but they are original to myself at least.
No-one knows yet, this isn't a debating topic, it's a wait till we get more facts and see what happens topic. Nothing disallows it in our current understanding of the laws of nature, but that doesn't mean there isn't a rule against it that we don't know. [editline]13th October 2011[/editline] Heck, we don't even know what time is.
I think the famous paradox of time travel can be avoided with a simple theory that is also relatively known. The fact that if you were to time travel back in time, something would change, thus it must have always been like that, but if it's always been like that, then nothing would have ever changed which means you would have not gone back in time and changed it. Follow me? Of course you do. Famous example: You go back in time to kill your grandpa. You kill him. But how? You wouldn't be able to exist if you killed him, therefore you would have never been born, and thus unable to kill him, but if you never killed him, there again you would be alive to go back and kill him. Reasoning around paradox: When time traveling, you are not jumping back in time, rather still on a continuous forward moving stream of time. Think of it this way. You are walking down a road. You walk into a restaurant. The place you are at/in changed, but time never rewound or shifted. This being said, time travel would simply be a changing of position in dimensions or universe. My conclusion: I don't think it's really possible to truly travel [u]back[/u] in TRUE time.
As time flys, we all travel in to the future, that is a fact. Einstein's theory of relativity can provide us with a short cut trough time. Lets say we have two twins. One is left back on Earth living a normal life, the other is blasted to space with almost the speed of light. Einstein's theroy mentined earlier, teels us that faster the object movies, the slower time passes for that object – this phenomenon is known as time dialation. Years later when the twin returns, she has not aged much, but her sister left back on earth is in her mid 70's by now.
[QUOTE=Nexus651;32762669]Theoretically time travel, to the future is possible. I remember reading a borrowed book some time ago on this subject. It explained the entire process in a simple to understand matter. [i]There were two twins the same age, one was blasted into space with 99.9% speed of light, the ship she was on was programmed to return to earth after 3 years. She aged by 3 years, while her twin back on Earth was in her mid 70's.[/i][/QUOTE] I read about a REAL story similar to that. But there was a man who orbited the Earth in a satellite for like a year (not really a year, I just forget the actual amount of time) going at thousands of miles per hour. Supposedly he was like .5030 minutes or something ahead of everyone else or in the future.
I always think about this when I hear about space travel: [img]http://www.geekologie.com/2010/05/06/time-travel-full.jpg[/img] I know that (theoretically) wormholes attach to the nearest point of gravity but w/e.
I've been thinking alot about this, but I think time will only ever go forward, and that nothing can be reversed.
The faster you get to the speed of light the faster times goes around you, then what happens if you have something (Or are) going at exactly the speed of light?
[QUOTE=Sobotnik;32762866]The faster you get to the speed of light the faster times goes around you, then what happens if you have something (Or are) going at exactly the speed of light?[/QUOTE] Going at the speed of light is impossible. Therefore your answer doesn't have any practical answer. But mathematically, what would happen is that the moment you hit light speed, you would travel [I]infinitely[/I] into the future. I.e. time would stop for you and the universe would age infinitely.
[QUOTE=Rad McCool;32763446]Going at the speed of light is impossible. Therefore your answer doesn't have any practical answer. But mathematically, what would happen is that the moment you hit light speed, you would travel [I]infinitely[/I] into the future. I.e. time would stop for you and the universe would age infinitely.[/QUOTE] Wait, so if light travels at the speed of light then wouldn't the universe age infinitely around a photon travelling at the speed of light?
I recall my physics teacher explaining me, that because of thermodynamics, specifically the theory of entropy and how it can only fall or remain unchanged, time could only move forward. [editline]13th October 2011[/editline] [QUOTE=Sobotnik;32763725]Wait, so if light travels at the speed of light then wouldn't the universe age infinitely around a photon travelling at the speed of light?[/QUOTE] If you were a proton, time would seem not to pass at all.
[QUOTE=Sobotnik;32763725]Wait, so if light travels at the speed of light then wouldn't the universe age infinitely around a photon travelling at the speed of light?[/QUOTE] The reason photons travel at the speed of light is because they're [I]massless[/I] which coincidently means they are not subjects of time dilation. Furthermore photons are not sentient and they cannot "experience" time in such a fashion. :)
Anything's possible, Marty! In all seriousness, I don't really know.
Possible, quantum physics says it is possible for atoms to exist in more then one place at a time, so it wouldn't be like "oh lets go back to the 50s" it would be going to a different space, there for time. Like the idea of a worm hole, taking gravity to shorten the fabric of space time between two points. Like holding a blanket at two ends, then butting a bowling ball in the middle, the two sides get closer.
i think time is a direction, like up, down left or right. like length, depth, width.
I personally believe that time is a local phenomena associated with mass and consequently, gravity. I don't believe that it's a dimension at all.
[QUOTE=BenJammin';32720892]I honestly don't think it's possible. I mean if there weren't any boundaries then something would have gone back in time and fucked the whole universe. I am a dumbass though so I have no knowledge or scientific evidence to back anything up, this shit is way over my head.[/QUOTE] Well, the 3 possible reasons why we have not seen ourselves from the future is A: It is illegal to do that in the future. B: You can't time travel. C: You can make a time machine, but it can never go back to a time before the time machine was created. I think the answer is C, because A would probably involve someone breaking the law, B looks easily wrong, and C has very good theories to back it up. The wormhole method of time travel allows the user to travel back to a certain date in time, but that date is never before the time machine was created, just like you can't travel through a tunnel that goes from the north pole to the south pole and end up in the tropics, unless during the time dilation part of the process, you can move one end of the wormhole faster than the speed of light. [editline]14th October 2011[/editline] [QUOTE=Wormy;32764277]I think time travel is an impossible thing to do, and it will never be achieved in the future. Going back in time could cause big changes to the history and the future. Imagine if you would go back in time and kill your mother when she was young, and then you get back to the normal time. You would not exist.[/QUOTE] I can answer that also. When you travel back in time, a new universe is created and added to the unlimited store of universes, which is the the one you end up in, so when you kill your to-be mother, you are actually killing the potential mother of someone identical to you (Identical if you exclude the massive butterfly effect that would be caused by your teleporting into this universe). So you can never travel back in time to murder your OWN mother, even after she gives birth to you. You will always end up murdering somebody else's mother who is identical to yours.
Until someone write a mathematical proof that says time travel is impossible, it might be possible
i dont know, thinking about time travel, you could assume that past, present and future are happening and that they are all here, somewhere. every millisecond would be one different reality, with lots of different possibilities. So if time travel is possible, so is multi universe existence.
Somehow be in the orbit of a super massive blackhole, and boom you're gonna be in the future. Though time travel backwards is probably never going to happen.
[QUOTE=XazoTak;32772202]Well, the 3 possible reasons why we have not seen ourselves from the future is A: It is illegal to do that in the future. B: You can't time travel. C: You can make a time machine, but it can never go back to a time before the time machine was created.[/QUOTE] D: No one fucking wants to come back here. E: We're all dead in the future. [editline]14th October 2011[/editline] [QUOTE=voodooattack;32771685]I personally believe that time is a local phenomena associated with mass and consequently, gravity. I don't believe that it's a dimension at all.[/QUOTE] But spacetime fully describes that AND includes time as a dimension.
[QUOTE=JohnnyMo1;32780536]D: No one fucking wants to come back here. [/QUOTE] Never underestimate a human. It has caused the ruin of many. Out there if they did find a way to travel back in time you would find somebody insane enough who would go back in time.
Here specifically. To this point in human history.
[QUOTE=JohnnyMo1;32783254]Here specifically. To this point in human history.[/QUOTE] They could very well be. They could be merely staying quiet and low whilst watching a event. A traveller from the future will have knowledge of what happens next, so who knows.
I want to think it's possible. They (Berkley College) recently discovered something that travels faster than light with may be a big breakthrough in the world of physics because it breaks every rule the natural world is built upon.
I'm pretty sure we'd notice if time travel backwards was possible. Also, for time travel backwards, you'd somehow have to rearrange every atom as it were at that moment. Which is impossible. To me, time travel backwards is nothing more than fiction. While time travel to the future is still possible, I mean the guys up at the ISS are technically "time traveling" as we speak.
I'd like to point out (sorry if I'm late) that if time travel is possible, then alternate realities probably are as well. The world cannot simply change in the blink of an eye, and really that wouldn't make sense anyways as it would already of happened. E.G. if I go back in time and stop the computer from being invented, then obviously none of your computers would suddenly disappear. However in my timeline, they'd of never existed. So any changes to the past would only affect the time traveler's own timeline. Each time he went into the past, he'd be creating a new alteration to his timeline. This could also very well explain the age old question of "If Time Travel is possible, where are all the Time Travelers?"
[QUOTE=booster;32789729]I'm pretty sure we'd notice if time travel backwards was possible. Also, for time travel backwards, you'd somehow have to rearrange every atom as it were at that moment. Which is impossible. To me, time travel backwards is nothing more than fiction. While time travel to the future is still possible, I mean the guys up at the ISS are technically "time traveling" as we speak.[/QUOTE] unless of course you didn't change anything after all
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