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  1. #1 New guy 
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    Hey I am a high school kid and was just learning about Einstein and Hawkin. I was wondering is there any data that supports or denies the concept of time travel?

    John


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    Read a book.


    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

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    I would like a hint before i go on a wild goose chase and reading Hawkin's massive book.
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    There are things that both support and deny time travel.

    Support:
    Moving the speed of light has been proven to slow time by a large portion, so with the use of a taceon moving significantly faster than light you should be able to reverse the flow of time.

    Deny:
    Taceons are impossible by a certaint law of physics, however, physics has been disproven many times before.

    Hope that helps
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    There is no real support for time travel, othere than psuedo travel utilising time dilation (where you hover near a black hole for 30 seconds but come back a million years later... Time travel was envisaged by sci-fi writers contaminating the minds of children who grew up to be scientists who then failed to seperate fact from fiction.

    You can 'see' back in time, you cannot see the present, when you look at your hands the light has taken a nanosecond or two to travel to you. Your optical system and brain then take a while to flash it up.

    If you could instantly travel 100 light years off into space and turn a telescope back on earth then theoretically you would see the earth as it was 100 years ago but you cannot go there.

    I am not a believer in 'folded space' wormholes or any other crap which originated in hollywood or some sci-fi writers mind, and is perpetuated by scientists who should have grown up long ago. Since I am not likely to be around for more more than a decade or two more (at the very most) it is sufficient for me to believe time travel will never be possible.
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    Theoretically, if one hovered in a black hole and was themselves moving near light speed and the black hole itself was rotating spacetime around it, then you now can add the motion of spacetime on top of your own motion (which if the two are great enough) then to an outside observor you would appear to be going faster than light and thus should when you leave the black hole wind up in the past.

    Of course most of you should already know that being able to do this is percieved by some to be very difficult.

    Megabrain, janus argue away at this all you wish, but this itself is Einsteins theory and also shown to some extent to be theoretically correct by professors who have far more experience, wisdom and knowledge than you'll ever have. All I'm doing is mediating it to this science forum.
    "If you wish to make an apple pie from scratch, you must first invent the universe". - Carl Sagan
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    Thank you for the help you last three.
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    I am not a believer in 'folded space' wormholes or any other crap which originated in hollywood or some sci-fi writers mind, and is perpetuated by scientists who should have grown up long ago. Since I am not likely to be around for more more than a decade or two more (at the very most) it is sufficient for me to believe time travel will never be possible.
    Actually, worm holes are theoretically possible. Stephen Hawking once announced that black holes are not actually black, but have a glow about them. This seems to go against the idea of a black hole though, since no light should be able to escape. Well, there is no light escaping, the glow is due to a large influx of negative energy traveling into the black hole, which subsequently lowers the mass of the black hole and creates the heat radiation that is responsible for the glow. A wormhole is theoretically possible, but it would need some kind of negative energy in its throat to keep it open long enough for someone to travel through it before gravity crushes it.
    "I don't think we're here for anything, we're just products of evolution. You can say 'Gee, your life must be pretty bleak if you don't think there's a purpose' but I'm anticipating a good lunch."

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    (Discoverer of DNA)
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    Einstein/Rosen bridge (Apx 1916), under theoretical physics and from General Relativity Formula, addresses the worm hole with the White hole as the source for energy from the black hole. Some have suggested the second law of thermodynamics make the case for such a phenomenon.

    Personally, guess old fashion, but the BH to me is still a phase in the death of a neutron star and this evaporation is ongoing, even while implosion is in progress. Limiting pressure, which should be needed for a WormH to WhiteH release of a pressure. As said above, I also think Hollywood played a great deal in keeping these theories alive, even if barely.
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    any good books on this that a non scientist would understand.
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    so does anyone actually believe that it is possible to travel back in time and if you think it is possible could you give me an idea of how much energy you would need
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    Have they really proven that time slows down as you go faster?
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

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    Quote Originally Posted by Cold Fusion
    Have they really proven that time slows down as you go faster?
    Yes using muons (particles) in the atmosphere. Relativity's right.

    Rhysoboi. It would take infinite energy to go beyond the speed of light, provided that, the theory that if you d means time goes backwards. But the closer towards light speed you get (299,792,458 m/sec) your mass gets closer to infinite. So you'd have to have infinite energy to get to it and infinite energy to go beyond it. But who knows there could be another way. Just use your noggin :wink:.
    "If you wish to make an apple pie from scratch, you must first invent the universe". - Carl Sagan
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    Quote Originally Posted by ilikeick
    any good books on this that a non scientist would understand.
    You best bet would be to google, using words your interest are in. Any good article, usually references books, their article is based on. *Time Travel Einstein* a good place to start.
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    Quote Originally Posted by Cold Fusion
    Have they really proven that time slows down as you go faster?
    Yes, they feel they have proved time slows with velocity/speed. The faster you move the slower time passes. Special clocks placed on super sonic aircraft traveling in opposite directions, the most often used example.
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    Quote Originally Posted by rhysboi1991
    so does anyone actually believe that it is possible to travel back in time and if you think it is possible could you give me an idea of how much energy you would need
    IMO, I feel travel at plus C (speed of light) or faster will be someday a reality. Probably never by mankind (times required to accelerate to C), but some vehicle of sorts. Where I get off of the formula, is past C where time reverses is suggested. You would have to get involved in realms or dimensions as a reality. Simultaneous existence, so to speak, to solve the possibility.

    It is said, the energy required to move mass past C, is infinite. In short that means its not possible to exert such energy. My guess is thats based on energy as we now understand it and in the conditions (environment) we understand.
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    cheers i think i have got some sort of idea now ill go look on wkipedia or something to get more of a understanding
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    thanks for the help
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    Do they know why time slows down though?

    Time only slows down then relative to everything else that is not traveling as fast you are....and you never said anything about only the acceleration slowing time down, so, this leads to a conclusion. Right now, we are not only circulating around the sun, but we are moving around the galaxy, and are being hurled into space by dark energy, hence the expansion of space. Do you know what that means? WE are moving VERY VERY VERY fast right now, and that would mean that time is slower inside of the galaxy than outside...it also means that the exponential acceleration of the universe is CAUSING TIME TO SLOW DOWN. What do you think of that???
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

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    So if the universe didnt move or expand by the dark energy time would be faster? Or are you saying that time is just a relativity and that it depends on where you are in the universe? And is the dark energy the same thing as anti matter or different?
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    (for the fist two) I'm saying both.

    Antimatter it very different. It is the opposite of normal matter, and will annihilate when it comes in contact with normal matter. Dark energy is seen as an anti-gravity that causes exponential acceleration the farther you travel into space. Dark matter, has been described as the "scaffolding" that holds the universe together and prevents dark energy from tearing the universe apart. Dark matter also apparently tends to agglutinate around areas with matter in them.

    I'm still researching anti-matter so I can't say for certain yet exactly how it is created and in which way certain atoms contain it.
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

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    Use your computing strength for science!
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    If you were to be outside of a Galaxy, then time would be faster....it is by what forces are causing your movement, rather than your arbitrary coordinates.
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

    -Einstein

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    Use your computing strength for science!
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  24. #23  
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    using a photon clock they have proven that light slows down as you speed up
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    We travel on our planet rotation (.46km/s), orbit around the sun (20km/s), around the core of the Milky Way (230km/s) and our cluster of Galaxy moves through space about 600km/s. Light in a vacuum however travels at 299,793km/s. If all the speculations were correct and you could conceivably stand still in open space w/o motion, you would age 1/300 faster.

    When thinking of back tracking in time; Imagine traveling at 2 times C and aging. If your aging was reversed (if you feel all bystanders are doing so) then your age should should also be. At some point a baby and then a fetus to an egg. Even if you feel as some do, that the traveler does not age less, but the bystander (ever thing else) does reverse, then this illogical scenario would have to be, to return to another or lessor time zone.

    IMO; At very best, a time traveler could only visit a time that existed, when that travel was started...That is the traveler experienced normal time, but (all else) experienced very little, to the point of no time passing.
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    how would anti matter be stable if it destroys itself and matter when the universe is full of matter. would it be like since there's plants with matter there planets with anti matter?
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    The rift where antimatter met matter would relice so much energy that we would have found such a place. antimatter must be seperated from regular matter completely. We use magnetic fields for this.

    Question: antimatter and matter are created in equal proportions..... Must they be destroyed in equal proportions?
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    Are you definitively saying that there were? I have heard a few hypothesis about this, and how when the universe started, we had an equal amount of both, but that would mean that there wouldn't be normal matter today! Both would have annihilated. The question is, what exactly is in the annihilated anti-matter/ matter collision and can it reform and agglutinate back into either? Maybe once annihilation occurs, like rolling dice, there is a chance that either will reform more of itself more than the other..and when they annihilate again once will be left over with more of its matter left, then chance comes in again as to which once is formed in greater amounts, and the process repeats until one wins out over all. One thing that I'm confused about though, does the annihilation follow the energy conservation rules? As in, does it actually loose or destroy any energy or is it all converted to another usable form?

    Ok, even if they did prove that time slows down as you go faster, do they know why? And since time is only relative, if the whole universe equally slowed down through some device, then it would be like time never slowing down in the first place, right?
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

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    My question: if antimatter MUST react in equa quantities. If it doesn't have to, our having wich matter we have is based on random chance. They were reacting, and suddenly after a while there was randomy more of one than another. Ths could cause the rift to become bigger, and after a while the destruction could end up working in the favor of what we call regular matter, though in fact there is no such thing. If it went the other way we might just be made out of antimatter instead, and we'd look at regular matter as "anti" and that would be the matter that we cannot find because it coult not exist in a universe of mostly normal matter.

    My idea about matter-antimatter reactions in unproportion... I don't know enough to know "if two antimatter protons/electrons ect. came in contact at the exact same time with one normal thing, what would happen? This is improbable. In a universe with so many atoms though, it's gonna happen.

    "It is now thought that symmetry was broken in the early universe during a period of baryogenesis. Particles and antiparticles evolved slightly differently. It was found that a particular heavy unstable particle, which is its own antiparticle, decays slightly more often to positrons (e+) than to electrons (e−)."

    Another thought.

    Time travel backwards is impossible for many reasons. Many of those are stated on this very post.
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    could traveling back in time or forward in time be impossible by the fact that time is always going forward(if it is)? And that no matter what you do you cant go back in it or forward only appear that you have been doing the black hole idea tht is popular?
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    Quote Originally Posted by ilikeick
    could traveling back in time or forward in time be impossible by the fact that time is always going forward(if it is)? And that no matter what you do you cant go back in it or forward only appear that you have been doing the black hole idea tht is popular?
    Time is relative. I'd like it to be possible but scientiffically I cannot justify it. Travelling forward however... your doing it right now... you want to travell forwards a few centuries, a millenia or two mayhap? then go freeze yourself
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    Time doesn't exist, at least not in the way that most people understand it to-or in the way that scientists name certain properties as time. Time is only caused by change, so to go back in time, you would have to reverse the motion of every particle in the universe all at once; of course thats impossible through ordinary means, but who knows...If we don't destroy ourselves in the next hundred years, and allow science to prosper for the next 2,000 years, we might find a way!
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

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    Ok, I'll throw this out there as a theory: What if there is some type of particle in the universe whose motion is synchronized to every other particles? If we could find it, and involve a controlled manipulation on itself, we could either destroy all of time as we know it , or forward/reverse it. 8)
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

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    So now your saying cold fusion that time travel would be impossible? and Nevyn you dont think it is either?
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    Time travel through the common perception is impossible; but through what I said, there is a fraction of possibility.
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

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    1/99999999999999999999999999999999999e99999999999999 99999999999999999999999

    That fraction might do the chance justice. It might be a little big though.
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    Quote Originally Posted by ilikeick
    So now your saying cold fusion that time travel would be impossible? and Nevyn you dont think it is either?
    I think it's impossible
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    Nothing is impossible (within reason)! I might only be impossible for us to do, but not for it to be done at all.
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

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  39. #38  
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    Quote Originally Posted by Cold Fusion
    Nothing is impossible (within reason)! I might only be impossible for us to do, but not for it to be done at all.
    what If I think it isn't within reason to travel back in time? it's impossible
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    We have such limited intelligence! I don't think that any person in existence can 100% say that its impossible.

    I mean, I subjectively think from my point of view that it is impossible; but I try not to think subjectively, I try to see things from a position above my subjectivity.
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"

    -Einstein

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    Theoretically, if one hovered in a black hole and was themselves moving near light speed and the black hole itself was rotating spacetime around it, then you now can add the motion of spacetime on top of your own motion (which if the two are great enough) then to an outside observor you would appear to be going faster than light and thus should when you leave the black hole wind up in the past.

    That's like saying if you were on a train going half the speed of light and you put that train on a train going half the speed of light, you'd be going the speed of light, then you could say if you had 2 of those trains driving at each other, relative to somebody on the other train you'd be going twice the speed of light, however, due to time dilation you wouldn't be.
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    THis whole thing about time travel is nothing but a load of bollocks perpetuated by failed scientitsts who became scriptwriters for hollywood.[/u]
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    Time is just a measurement. We measure time with a clock like we measure temporture with a thermomiter. maybe... temperature is a dimension!

    no?

    It's all Sciencefiction.

    bending down time, is not traveling through time differently.
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