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Time travel

Discussion in 'Science & Technology' started by skellattarr, May 7, 2011.

  1. AphexDreamer

    AphexDreamer

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    This is true as well, light does get bent around stars. This infact was used by Albert Einstein to prove his Theory of Relativity.

    Well yea but you know what I mean...
  2. silkstone

    silkstone

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    Dark matter is real matter, the dark matter in the universe has nothing to do with the spontaneous creation/destruction of matter/energy, i was just replying to an earlier post that was asking if there was a link between dark matter and all this.

    It's only called dark matter because we can't see it with any kind of telescopes, it neither emits, reflects nor absorbs any kind of observable radiation. invisible matter would be a more descriptive term.
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  3. wahdangun

    wahdangun New Member

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    so its mean particle actually never leave event horizon? Its quite make sense since beyond event horizon the time simply stop,

    btw what is negative energy? Can you explain it? Is it can canceling each other?
  4. BinaryMage

    BinaryMage New Member

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    Okay, I apparently misinterpreted your post. Thanks for clarifying. Yeah, I guess spontaneous creation is neccessary, the universe cannot have existed forever.

    I think what he was talking about is so-called exotic matter. Antimatter and antienergy are forms of exotic matter, and yes, antienergy/negative energy and antimatter/negative matter would have a negative energy and mass respectively. Just remember that negative is a mathematical term, not a physical one. And also, yes, they would essentially cancel each other out.
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  5. wahdangun

    wahdangun New Member

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    yes it can have surrounding light in black hole, even the scientist right now talking a possibility that a live can exist in event horizon because of that surrounding light.

    btw isn't gravity is some form of energy? Maybe because its immense of gravity blackhole starting creating particle, and thats why blackhole can fade away
  6. BinaryMage

    BinaryMage New Member

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    I know light can surround a black hole, I'm just talking about within the event horizon. The whole reason we can "see" black holes is because of the absence of light. I don't know how light could exist in the event horizon; whatever you're talking about sounds quite interesting. Gravity is a force, but some scientists believe that there is a "gravitational particle" that causes gravity.
  7. wahdangun

    wahdangun New Member

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    btw beside blackhole is there anywhere else that negative energy exist ? Because I'm not really believe it. I mean if the negative energy and energy collide they must form another thing, its not simply gone
  8. Kreij

    Kreij Senior Monkey Moderator Staff Member

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    I believe that times travel is impossible.
    There is only one moment of time in existance, and that is right now.
    Our perceptions of the past are stored in our memories, but that "time" no longer exists.
    Our ability to imagine the future is no different that our ability to imagine anything else, and that time has yet to exist.

    To attempt to travel to somewhere non-existant is but an imaginary pipe-dream, IMO.
  9. BinaryMage

    BinaryMage New Member

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    Mathematically, I think it is "simply gone", as you put it. I'm not sure, though, this is beyond my level of astrophysical knowledge.

    Time and our perception of it are different things, I think, though I suppose you could argue that they are one and the same. Time travel may well be impossible, but if it is, then this thread is pointless. :)
  10. wahdangun

    wahdangun New Member

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    ups sorry maybe not in the exact event horizon but we wouldn't know it because the light can't escape from it, maybe blackhole isn't pitch black after all, maybe its the brightest place in the universe.
    if gravity is not energy then how we get our electricity from(i mean powerplan from dam, not nuke or coal)?

    I think gravity is created from electron than spin in atom, because i have read some book that gosht particle can't be effected by gravity and just go trough our body
  11. Kreij

    Kreij Senior Monkey Moderator Staff Member

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    Discussions of theoretical topics, even highly improbable ones, are never pointless.
    They may not ever result in anything, but they make us think.
    That in itself is of value.
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  12. 2DividedbyZero New Member

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    in retarded hell
    this thread became very very popular over the next 6 months, thousands of replies, but i have traveled back to tell you the TPU community decided to agree on the fact that time travel is not remotely possible.




    [​IMG]
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  13. Kreij

    Kreij Senior Monkey Moderator Staff Member

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    2/0 travelled back in time to try to undo the infraction he got 14 days from now.
    Don't let him fool you.

    On topic :
    I would love to travel into the future to see the possibilities or consenquences of what we are doing, even if they were not certain and even if I could not remember them on return.
    I guess that comes from reading tons of Sci-Fi since I was old enough to read.
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  14. BinaryMage

    BinaryMage New Member

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    Point taken. I still think time travel may well exist, though.

    Alas, you have now created a paradox, because I have made this post in response to yours, which has changed the future, and now you will likely cease to exist, along with everyone else.

    That would be wonderful. Myself, I want to see what the human race can accomplish once we finally get over our current stage, and really begin exploring and bettering ourselves. Same on the science fiction. :)
  15. wahdangun

    wahdangun New Member

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    haha kreji, I have read what do you read too, you even copy paste it, but still if time was not 4th dimension then why we can travel to the future? Isn't that some short of movement in time? And i believe if the time was not the 4th dimension them there simply no time different at all in the universe
  16. Sasqui

    Sasqui

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    Proof that you can slow or speed up time (in relative terms):

    I don't beleive it is possible to go back in time... but who really knows?

  17. D007

    D007

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    I do not believe in time travel.. I believe in being able to "see" things that happened in the past based on the speed of light, but not going back in time. Just cause u can see something doesn't mean you can interact with it.. Although based on einsteins curvature of space theory which im pretty sure is proven as fact by now. It would actually be very possible to cut thru space and end up where you started before you even left.. But would that be only visible or actually physically real in all ways? That's the big question imo.

    The same can be said for moving at faster than light, as when you approach the speed of light time slows down. But the universe doesn't care about time.. If time travel was possible, don't you think we'd of met a time traveler by now? Maybe traveling thru time in such a way causes a paradox, where your actually in another dimension, exactly the same as the dimension your currently occupying.. So many questions, so few answers..lol

    This is called lensing:

    http://www.google.com/imgres?imgurl...a=X&ei=2ajFTZ2JI-f30gHhzvyzCA&ved=0CB4Q9QEwAQ

    See those curved beams of light? that's the distortion affect caused by gravity of massive objects if I remember correctly.
    Last edited: May 7, 2011
  18. BinaryMage

    BinaryMage New Member

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    Well, if we could travel faster than light, we could certainly see into the past by going far away from Earth and looking back, where the light we were receiving would be from Earth before we left.
  19. Kreij

    Kreij Senior Monkey Moderator Staff Member

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    I don't know what you've read, but I didn't copy and paste anything. That's just my ramblings.

    I agree with you last statement. There is no time difference in the universe. There is only now.
  20. BinaryMage

    BinaryMage New Member

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    But now cannot exist in any other form than an idea, because it can never be "now", in the sense that by the time you have though about it, it is now a different "now". (Sorry for the confusing explanation)
  21. D007

    D007

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    There is no difference in time in the universe I believe as well, but there is a difference in place which can be perceived as a difference in time. We've all heard the analogy if you take a piece of paper and fold it. Then punch a hold thru it and travel thru that hole, u end up in the next place faster. But that's a gravitational trick used by creating a hugely dense object similar to a black hole. Which of course is currently inescapable. So how people intend on using something that dense to punch thru space, when it would tear you apart atom by atom is beyond me.. and the rest of the world at this point..lol
  22. wahdangun

    wahdangun New Member

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    we can already back in time, but its not our past lol. If you see trough telescope and aim it to star you basically see to the past,

    we can't travel faster than light, because when we reach speed of light the time simply stop, so even tough the journey can span for thousand years we won't notice it, it will just a blink of eye when we reach our destination
  23. wahdangun

    wahdangun New Member

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    haha its interesting, because its same to what you said earlier, its said that time is not 4th dimension and its only exist in our math equation.

    But there is time difference in our universe, even our gps satelite is in different time than us. Or in the blackhole
  24. Kreij

    Kreij Senior Monkey Moderator Staff Member

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    If you travel at the speed of light, or greater, time does not stop. Time never stops.
    You are simply moving to a point in the universe that the light from a particular event has not reached yet.
    Could make for nice viewing, though.
  25. D007

    D007

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    Just because you can't travel faster than light doesn't mean you can't get somewhere before light does.. Look at the photon for example. It is always entangled in the opposite state as it's partner but it is never in the same location. You could have one of the entangled pair here and one on the other side of the universe but they will always react at the same "time"..
    Now that's science.. No telling why yet, but it just is..

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