Thread: Time Travel Possible?

Black holes...white holes...worm holes? Other means? Discuss.

Nope - Time travel is a hollywood fiction. You may be able to travel from one part of the universe to another using these things but time travel is out, once an event has occured it cannot be undone.

Originally Posted by Megabrain

Nope - Time travel is a hollywood fiction. You may be able to travel from one part of the universe to another using these things but time travel is out, once an event has occured it cannot be undone.

You know megabrain, with how closed that mind is (steel trap wise), you could join a circus.

I say it's possible, to travel into the future according to current well-known laws, and there are many hair brained ideas as to traveling back (none of which I like), so I have to say "it's possible"

jeremy: I endorse what Megabrain said. Read TIME EXPLAINED, and let's see who's really got the closed mind here!

Saying something isnt possible doesnt mean you have a closed mind. Since no one actually knows, going by what little we do know about other physics its a safe bet to say to someone who wants to know that it might not be possible. I could be wrong but it would be no different than someone being on a deserted island and asked to prove 1+1=2 but didnt even know how to. Since he wasnt sure would he be closed minded to assume that it would always holds given his information he had even though he could produce no proof of his assumption?

If I had to draw a line in the sand this moment I do not believe any time travel back into time could ever take place. I'm not a physicist and I could be wrong but wouldnt some conservation laws be broke going back into time? Wouldnt quatum entanglement have anything to do with this or is this an incorrect use of this term?
Traveling into the future by means of some machine that teleports versus moving at high speeds seems worse off. How could they get there with so much indeterminacy? How would one even know where they were going and when since the events havent even happened yet. Unless thrown to the future then you may assume that you'd have to step out of your travel device once in the future. Where did this come from or did it somehow go with you through time with the power it needed on board to get back? We cant even locate electrons in orbits precisely and given time we only know of their probability to be at a certain place. So unless all of this around us has already played out on some huge galactic simulation how could you go into what has not happened yet?

Strange stuff and it is too early in the morning for any of it, lol.

You must know what is Time?And how Time create? Please notice so many posts discuss Time...

Indeed! Time travel is possible! As a matter of fact, we're all doing it at a rate of one second per second....

Cheers,
william

If time travel were not against the principles of physics ,
it would be possible .
But we don't have any way of time travel till now(Go back past , e.g.100years ago) , that isn't against the principles .
So , I disagree the possibility of time travel .

Originally Posted by Jeremyhfht

Originally Posted by Megabrain

Nope - Time travel is a hollywood fiction. You may be able to travel from one part of the universe to another using these things but time travel is out, once an event has occured it cannot be undone.

You know megabrain, with how closed that mind is (steel trap wise), you could join a circus.

I say it's possible, to travel into the future according to current well-known laws, and there are many hair brained ideas as to traveling back (none of which I like), so I have to say "it's possible"

I do apologise it's just that I'm not as well up as you are on hollywood physics.

Originally Posted by william

Indeed! Time travel is possible! As a matter of fact, we're all doing it at a rate of one second per second....

Cheers,
william

good answer.

Originally Posted by Megabrain

Originally Posted by Jeremyhfht

Originally Posted by Megabrain

Nope - Time travel is a hollywood fiction. You may be able to travel from one part of the universe to another using these things but time travel is out, once an event has occured it cannot be undone.

You know megabrain, with how closed that mind is (steel trap wise), you could join a circus.

I say it's possible, to travel into the future according to current well-known laws, and there are many hair brained ideas as to traveling back (none of which I like), so I have to say "it's possible"

I do apologise it's just that I'm not as well up as you are on hollywood physics.

I'm sorry, it's just that I haven't read the latest issue of "how to be so closed minded you become a freak show"

It cannt occur in fact but happen in recollection or image .

Current theories proved that time can dilate at high speeds.
In fact it dilates at small speeds also, but we can't see it.

This time dilatation can corespond to a time travel to the future, but never to the past. In fact it is not time travel at all. The words "time dilatation" is just what it is.

I never heard about a serious theory that to accept time travel.
However we don't realy understand how our universe works.
We have some theories - "string theory" or "standard model", but they are incomplete.

So until we realy know what time and space are, we should not exclude any posibilities, unless we have a prove against.

Time travel has been proven, only forwards and only relatively, with the two atomic clocks flying opposite ways round the earth. small differences but differences all the same :-D

My point of view is simply that time tavel is a) wishful thinking, and b) a hollywood fiction.

(mod edit understood)
(removed)

You are NOT repeat NOT entitled to remove ANY moderator comments from your posts. You will face the prospect of an immediate and permanent ban should you do so again. - Megabrain.

Nope - Time travel is a hollywood fiction. You may be able to travel from one part of the universe to another using these things but time travel is out, once an event has occured it cannot be undone.

Time Travel is according to our current understanding of physics possible by einsteins general theory of relativity. Somekinda cylinder device bend and twist the spacetime so much in such a way you arrive before you started to travel. But with our current understanding of economy and matieral aviability that project is a impossibility since the cylinder is enourmus and is enourmusly heavy.

As for the timeline. A event that have happened and in someway effected the person who travel in such a way that changes in the past would lead to a paradox has a 0% chance of happening while any changes in the past wich doesnt cauyse a paradox has a probability of happening. Many changes will lead to a paradox thou depending on how far back you have traveled.

As I see it, it goes like this.

I'm standing at a bus stop and a space ship appears in front of me.

If it was truly travelling through 'time' how did it somehow skip the second before it appeared?

secondly, if it had travelled from the future, then the above remark does not hold water but I feel this one does.

Before it appeared there was a fixed amount of matter and energy in the universe, out of 'nothing' appeared energy and matter. That to my humble mind instantly throws theremodynamics out of the window.

I suggest therefore that if in order to 'time travel' you imply that some external 'force' [ie not of this universe] can influence events within this universe then I agree, it may be 'possible' however, we can only speculate as to whether anything can either exist outside our universe or influence events within it.

NOw I may not be that well up on the theory you have mentioned but I am aware that any theory or hypothesis which cannot be proven by experimentation or observation is mere speculation.

My stance is that time travel is impossible if governed only by the laws of our current universe [even if there are more to find.

If there were millions or only one time machine and everybody at some point wished to visit the Titanic on its maiden voyage then the boat would sink under the weight of humanity before it got to an iceberg. If so then shouldn't it be recorded as such?

Before it appeared there was a fixed amount of matter and energy in the universe, out of 'nothing' appeared energy and matter. That to my humble mind instantly throws theremodynamics out of the window.

This is rather classical thinking and youre treating space and time as speperate things and not as one. The amount of energy would remain the same in someway. This time machine i told you about is truly according to GR perfect.

The thing is that you can treat things according to classical ideas that there is a specefic amount of energy at any given time in the universe spatial but have to think that the amount of energy in the spaceitme continuum is constant and for it moving forward or backward in time is no differens. If you go with GR and SR there is no differens if the matter travel forward or backward throu time. It owuld be like saying that matter appear from "nothing" when its moving forward in time aswell

Watch the BBC Horizon Time Lords and they explain it better and more visual wich i know most people have easier to handle.

Originally Posted by zinjanthropos

If there were millions or only one time machine and everybody at some point wished to visit the Titanic on its maiden voyage then the boat would sink under the weight of humanity before it got to an iceberg. If so then shouldn't it be recorded as such?

You are of course welcome to pose the question in psuedo-science but this thread is a serious discussion of the possibility of time travel and it's possible mechanisms.

Zelos,

If I get the opportunity I will, if I've missed it then I'll have to wait for it to be put into practice to go back and see it

There are many things I can understand that others cannot [or simply refuse to accept], the notion of our universe being 'infinite but bounded' for example, SR & GR are not a subject close to my heart, classical physics, astronomy etc are, although aware of G&SR I do not have sufficient understanding to create a scenario from them or feel confident to debate. Accept then that in classical Physics TT is impossible, G&SR - maybe, and if by an influence external to our universe then 'anything goes'.

If there were millions or only one time machine and everybody at some point wished to visit the Titanic on its maiden voyage then the boat would sink under the weight of humanity before it got to an iceberg. If so then shouldn't it be recorded as such?

No it wouldnt cause that would cause a paradox and that cant happen.
But what could happen is that the increased mass of all new passagers makes the ship slower on turning so it hitted the iceberg cause it were unable to turn in time and therefor the timetravelers travel back in time was the acctual cause of the entire incident. The future history books would chance cause we would finally gifure out what really happened but all books until that date remain the same

IN which case they would all bugger off and keep their heads down and not admit it [it could be an offence in future to go back and meddle] so we would never know! 8)

nope. But most time machines only allow backward/forward travel aslongest the time machine exist in the time they are traveling to

If the type of universe we inhabit is some vast computer prgram [the size of the universe being limited to the amount of disk space available, where the expansion is due solely to 'regular upgrades'] then there is every possibility that bi-directional travel is very possible, but again it would require 'external intervention' - THis is a [matrix like] scenario outside our own existence and therefore another of the 'anything goes' category.

I submit that before time travel is seriously proposed we need a little more information on the factual rules of existence.

I submit that before time travel is seriously proposed we need a little more information on the factual rules of existence.

futher explination is requried

A complete knowedge of the constituent parts of our universe and the laws that govern them. For example, wormholes are a conjecture, we do not yet know whether they exist, some mathematics allow them to exist but this it not absolute proof, similar it may be argued for big bangs, black holes, dark matter and whether single or multiverse applies.

you know they said the same thing about black holes untill we watched a star get sucked into one by hubble, or noticed strange gravametric disturbences equal to 300 times a red dwarf star.

but yeah, the world is flat and all that noise =)

in my oppinion if Time Travel is possible the key is faster then light travel,
and i belive the key to faster then light travel is the Alcubierre Drive though it IS only a thoery, i find it the most realistic adaption of the faster then light travel theory.

The Warp Drive aint like youre moving FTL but space around you bieng stretched and contracted to make you move. So your basacly standing still so by using a Warp drive you dont time travel.

They key to timetravel lies in GR and i think it just maybe be possible.
Watch BBZ Horizon Time Trips (2003) and you get the idea of the cylinder thing i told you about