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Thread: Time Travel

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    Senior Member TopherRed's Avatar
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    Default Time Travel

    Hey, did anybody see that Today show interview with those scientists discussing the possibilities of time travel? I'd love to hear if it was more than just a fluff piece, but the video is blocked on my work computer.
    Love is the point.

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    Magical BlackCat's Avatar
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    I googled for this today show video, and I didn't come up with any video. Can you provide a link for us to watch so we can input on it? If it's blocked that means you tried to access it, and that means you have a link for us.

    Here is an article that's highly interesting to me that someone wrote about how time travel is theoretically possible.

    I recall several times digging around in my parent’s garage, looking for tools and knick-knacks that look like they might belong on a time machine. However, despite my scientific initiative, my parents always thwarted my efforts before I was able to get the engine off of our lawn mower. I was left to simply contemplate what time travel is all about.

    I wondered, is time travel really possible? Is there a science behind it all? I guess if you think about it, we are all time traveling right now. Only it is just no fun moving through time at the simple pace of one second per second. Let’s face it, when we fantasize about time travel we dream of going hundreds, maybe even thousands of years into the future or past.

    Well, Time travel is possible. Scientists have even known the formula for over a century now. If one mention’s the word “Scientist,” Albert Einstein is often the first name that comes to mind, and for good reason too.

    In 1905 when Einstein was just 25 years old he published his special theory of relativity. In his theory the central idea is that time is elastic. Essentially time can stretch and shrink. I can sense the readers out there thinking to them selves “How exactly can time stretch and shrink?” Well, the answer is relatively simple. All you have to do is move really fast.

    You see according to the special theory of relativity, the exact amount of time it takes you to get from one spot to another depends on how the observer is moving. In other words, the faster you move the faster you get there.

    But just how fast can one move? Science shows that we cannot move at the speed of light (186,000 miles per second). We cannot because the faster an object moves, the more massive it becomes and the more massive it becomes the more energy is required for it to build speed. Simply put, collecting enough energy to go the speed of light is just out of the question.

    Light is an interesting subject to think about. The nearest star to our planet is about 4 light years away from us. Traveling at 186,000 miles per second it takes that light 4 years just to reach earth. This means that at night when you go outside and look at the stars you are actually looking into the past. The light that you are seeing from those stars actually first shone years and years ago.

    Our own galaxy is somewhere around 100,000 light years across. So using conventional travel methods it would take a whopping 100,000 years to go from one side of the Milky Way to the other, That is of course, if we were able to go the speed of light.

    At least that is how long it would seem to take if we were watching from here on earth. To the Astronaut it would seem to have taken a much shorter amount of time. Why? Because time is stretched by speed, the faster you move the more time slows down, or as I said before, the faster you go the faster you get there!

    To quote the book How To Build Time machines by Paul Davies “ In a spaceship traveling at 99 percent the speed of light, a trip across the galaxy would take just 14,000 years. At 99.99 percent of the speed of light, the gain is even more spectacular: The trip lasts a mere 1,400 years. If you could reach 99.999999 percent of the speed of light, the trip could be completed in a human lifetime.”

    To further explain in more understandable terms picture this; here we are in 2009 and you and your friend have acquired a space ship that can go 99 percent of the speed of light. Your friend gets in the ship and takes off at near the speed of light. They travel 10 light years then turn right around and comes right back at the same speed. When their trip is over, only three years have gone by for them. But here on earth it is now the year 2029. It took your friend ten earth years to get there and ten earth years to get back but because she was the one in motion only 3 years have gone by for her.

    In a way your friend has just time traveled 20 years into the future and it only took 3 years. Now let’s just hope your friend does not change their mind and decide they want to go back in time so things can be the way the used to be. If that is the case it may seem that your friend is out of luck. For high speed motion is a one-way ticket to the future.

    But is there a way to get back? The short answer is yes. But what is that way? In 1937 a man named W.J van Stockum published a paper in the Scottish scientific journal. Van Stockum used Einstein’s work to figure out what would happen if an object went into orbit around a rotating cylinder. What he learned was that if this cylinder spun fast enough the object could return to the time before it even left. What this means is that a closed loop in space is also a closed loop in time.

    When I first heard about this I wondered why no one really knew much about it. It seems like such a revolutionary discovery. Then I realized the flaw in Van Stockums logic. In order for his idea to work, this cylinder would have to be infinitely long.

    About 10 years later however, another person found a much more realistic way of traveling into the past. An Austrian logician named Kurt Godel. Godel learned that if the entire universe were rotating, it should be possible to find orbits in space that actually spiral back into the past.

    All though his work in this area was meant more as a simple curiosity than a serious look into the matter, his work slowly led scientists to look into something that was coined “Einstein-Rosen Bridges”, better known today as wormholes.

    Worm holes open up the possibility of traveling anywhere (or when) in the universe by shortening the distance between point A and point B rather than shortening the amount of time it takes to get there. This works because to open a wormhole is to fold the universe in on itself.

    Think of it this way. Imagine the universe as a piece of paper. On one end of the paper is a dot. That dot is earth. On the other end is a planet that we are interested in exploring. Well this planet is millions of light years away so by conventional means going there is out of the question. Fold that piece of paper in half so that one planet is right above or below the other and you have just shortened the distance between the two by a great amount and therefore have made it possible to go there.

    Opening a wormhole loops the universe on itself there by shortening the distance between two objects and just as Van Stockum wrote, a loop in space is also a loop in time. To loop time is to be able to go to any time you wish.

    What this all means is that with the help of rapid movement and high speed your friend can travel into the future, and with the help of a wormhole your friend can also go into the past.

    As you see, scientists have known how to travel through time for many years. The only thing that has kept us from doing so is a lack of technology. The question is will we ever gain this technology and if so how will it affect the universe and our daily lives? Only time will tell.
    Just throwing this out there...
    () 9w8-3w4-7w6 tritype.

    sCueI (primary Inquisition)

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    Feelin' FiNe speculative's Avatar
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    After discussing time travel and other related topics, it became very late. At some point around 3am, after we were too tired to think, my friend simply said, "Time is this all-encompassing force that kicks ass and makes you die." I laughed so hard, I almost succumbed to the ravages of time. It's still one of the very few quotes I remember exactly as it was said from someone I know...
    "How can I be, all I want to be,
    When all I want to do is strip away these stilled constraints
    And crush this charade, shred this sad, masquerade"
    http://www.youtube.com/watch?v=qGeq5v7L3WM

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    Senior Member The Outsider's Avatar
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    Time travel works. Trust me.

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    Courage is immortality Valiant's Avatar
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    Hey BlackCat.

    I have been thinking about something for a long time. Or... Actually, a few things.
    First:
    Everything rotates. From a sub-atomic level to the galaxies.
    Even the universe. Everything consists of bodies moving around other bodies.
    They say that universe is infinite. If this is the case...
    Then it must be moving at an infinite speed, too.
    As far as we know, the speed of light halts things. It makes time stop, basically.
    What it does, in the grand scheme of things, is that light speed is equal to the rotation of the universe, thus creating a point in the space-time continuum that stands still.

    Now you might be thinking about stuff rotating only one way, and if you go at "light speed" the wrong way, time will speed up... I'm not sure about that.
    I don't think it's that simple, and i'm having huge problems formulating my thoughts right now.
    I have this understanding in my head, that I have a hard time relaying to you.


    Archimedes once said: "Give me the place to stand, and I shall move the earth.".
    Well, that can be interpreted in many ways. The meaning of what he said, and the meaning of the words in Swedish, is actually "Give me a steady point to stand on, and I shall move the earth".

    Well... I can't exactly express what i'm thinking. Hope you understand what I mean, even if you might interpret it in some odd way
    Well, my words are not truth, so... Interpret away.

    Mightier than the tread of marching armies is the power of an idea whose time has come

  6. #6
    Courage is immortality Valiant's Avatar
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    Oh, I was going to write a second one... Got caught up in finishing the first one before my head exploded. Hold on a few more minutes.

    Mightier than the tread of marching armies is the power of an idea whose time has come

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    Magical BlackCat's Avatar
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    I haven't really looked much into it in that way... How is it time travel if it just makes everything stop?

    I dunno, we need some actual scientific information. That article I linked was just by some bored ENTP I imagine. Like, we need raw facts and not theory to get anywhere with this.

    Now if only we had the video that the OP was talking about...
    () 9w8-3w4-7w6 tritype.

    sCueI (primary Inquisition)

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    Courage is immortality Valiant's Avatar
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    Anyway. As I said, everything rotates. I base much of my thinking upon this, I know. There are other variables and assumptions etc. It's really just a little brain exercise.
    Where was I? Yes. Everything rotates into what we perceive as time-space.
    Ever heard of anti-matter? Yeah, those particles are the opposite of what we have, and they do supposedly exist somewhere.
    That somewhere has got to be pretty fucked up according to our standards.
    If everything is backwards, then even time must flow in another direction.
    Perhaps we're even talking about another dimension?

    Gah, I hate thinking about things like this somehow. And I love it, at the same time.
    But all the possibilities makes my head explode after a while. It's way easier to just think of one thing at a time, but everything everywhere is related, so it's kind of hard not to.

    Mightier than the tread of marching armies is the power of an idea whose time has come

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    Courage is immortality Valiant's Avatar
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    Alright, dude... What I meant with making stuff stop is that you're in a whirlpool.
    If you stop, the place you're going to is coming towards you very rapidly.
    See my point?

    Mightier than the tread of marching armies is the power of an idea whose time has come

  10. #10
    Nips away your dignity Fluffywolf's Avatar
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    http://www.typologycentral.com/forum...dimension.html

    Link to a thread with some stuff about it.

    Basicly, I think it could very well be possible. But I doubt it could prove useful.
    ~Self-depricating Megalomaniacal Superwolf

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