What is Time traveling: Definition and 19 Discussions

Time travel is the concept of movement between certain points in time, analogous to movement between different points in space by an object or a person, typically with the use of a hypothetical device known as a time machine. Time travel is a widely recognized concept in philosophy and fiction, particularly science fiction. The idea of a time machine was popularized by H. G. Wells' 1895 novel The Time Machine.It is uncertain if time travel to the past is physically possible. Forward time travel, outside the usual sense of the perception of time, is an extensively observed phenomenon and well-understood within the framework of special relativity and general relativity. However, making one body advance or delay more than a few milliseconds compared to another body is not feasible with current technology. As for backward time travel, it is possible to find solutions in general relativity that allow for it, such as a rotating black hole. Traveling to an arbitrary point in spacetime has very limited support in theoretical physics, and is usually connected only with quantum mechanics or wormholes.

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  1. P

    B Need help with understanding time travel

    Ridiculous! I know. But as a 9th grader, there are a few things that have been bugging me. I had a conceptualisation of how 'time travel' could work. However, it's based on the presumption ( a very large one at that) that the many-worlds interpretation of quantum mechanics is correct...
  2. E

    Why is it thought that black holes could make us travel to the past?

    I very often see in movies and works of fiction that scientists explain that with a black hole you can travel in time and how the characters use black holes to travel in time, more precisely to the past Do scientists really believe that time travel through black holes is likely? If so, why?
  3. Azrion

    I Exploring the Concept of Time Traveling

    I am curious about time traveling. According to Einstein's special relativity, the easiest way to travel into the future is by approaching the speed of light or faster. Now assume this setup: Sunlight travels to Earth at c (speed of light). We have the technology to reach speeds faster than...
  4. Delta2

    B Time traveling in the future and in the past

    As far as i know, current special relativity allows for time traveling but only in the future. In sort what we have to do to travel to the future, according to special relativity, is to make a spaceship that can achieve speed comparable to the speed of light. Then while we are traveling with...
  5. T

    B A Possible Challenge To Chronology Protection Conjecture?

    Correct me if I am wrong, but my basic understanding of how the Chronology Protection Conjecture (CPC) would work is that, as virtual particles created from the quantum fields of the vacuum would traverse a wormhole and arrive in the past, they would then travel back into the wormhole alongside...
  6. whitsona

    Objections to Previous Time Traveler's Conventions Needed

    I run a Maker group for teens at the Pensacola MESS Hall. They have decided to host a time-traveler's convention along the lines of the one hosted at MIT and by Stephen Hawking. The planning committee is looking to improve on previous design flaws in the other conventions. (Dr. Who raised a...
  7. N

    I Why teleportation, time travel, virtual reality haven't happened yet?

    (I apologize beforehand if I'm asking such an 'amateur' question , I admit that I'm not a physics student / physicist nor scientist / science student ,.. but , as just a 'normal ordinary' person, at least I am very interested in these things ,. and how I deeply wish Humanity / Mankind can 'leap...
  8. TachyonRSC

    B Time Travel - Does It Create a New Dimension?

    Hello and first of all I would like to say that I appreciate your work here since I am new to this forum. So here it goes. I was wondering for a long time. Someone travels back in time somehow and let's say he goes 1000 years back. He knows the future and he makes an action to change it. Our...
  9. A

    What Comes Next After Secondary Education? A Senior's Dilemma

    I do not know what to write here, so I just going to say hi! I am Aura a senior 2016 and in this point of my life the time has come to make in my opinion "the most decisive" decision of my life.
  10. J

    The Anthropomorphized Time Traveling Paradox.

    The most famous time traveling paradox is the Grandfather Paradox, where the traveler goes back in time to kill his own grandfather and thus prevents his own birth--a paradox. An adaptation to this paradox is Hawking's Mad Scientist Paradox where a mad scientist opens up a wormhole one minute...
  11. C

    Pertinent question regarding time traveling

    Suppose I traveled back in time 10 seconds. As the Earth is revolving around the sun at a great speed, I would end up in outer space as the Earth 10 seconds ago hasn't yet reached my actual position. Or, as time and space are connected, would I still end up where I am sitting now, but 10...
  12. T

    Questions about results of time traveling

    I have been writing a lot about time travel and what would happen not only once you time traveled, but when you went to come back. Would that be possible? You might of ended your own timeline by entering another time and therefore, your use to be present timeline has already been written for you...
  13. Q

    Is Time Travel Possible with Quantum Mechanics?

    Because the universe is inherently not-detirministic by the very nature of atoms themselves, if we went back in time, wouldn't there have to be a chance of atoms occupying different 3 dimensional coordinates even if they are occupying the same 4 dimensional coordinates that they once occupied...
  14. G

    Time Traveling Light: Is Time Relative?

    So, time is relative right? Then how does this statement make sense: Light from the sun takes 8 minutes to get from the sun to the earth. So, if we looked at the sun we see the sun 8 minutes ago. If time is relative, wouldn't time move much slower for the light particle? So to us, it has...
  15. A

    Could Time Travel Be Possible By Studying Particle Motion in the CERN Collider?

    hi, in the CERN particle collider they have found out that the particles are moving in time.can this concept be put to reality after studying the motion of the particles in the CERN collider all answers are welcome
  16. S

    Clarifying the Misconception: Do Positrons Really Travel Backward in Time?

    http://upload.wikimedia.org/wikipedia/commons/b/ba/Feynman_EP_Annihilation.svg this is a standard electron-positron collision. but if positrons can be interpreted as electrons going backward in time (as suggested by Feynman and Wheeler), then can this diagram be interpreted as the electron...
  17. D

    Exploring the Possibility of Time Traveling at Light Speed

    Just read about the advances on traveling at the speed of light. I have a problem about the whole "time travelling" theory. If (or maybe when) the human race can travel at a speed faster than time itself, how could we possibly go back in time? Surely going faster than time would mean that you...
  18. B

    Why time traveling (To the past) is impossible.

    I figured if anyone would understand my theory it's you. Now for one I'd like to make it clear I don't believe in time travel. I believe if you go faster then light (If you can..) you'll rip through the space-time countiuem and slip into a pocket dimension, it folds around you. And you're in a...
  19. O

    Rotional Motion Time Traveling

    I have a first clock tied to a string. At the other end of the string is the second clock. I swing the second clock around the first clock. I bring the second clock near the speed of light, while the first clock is at near rest compared to me. A constant force must be applied to the first...