time travel... is it possible?

Question

i hear on a documentar about blackholes if you went into a black hole you could end up in the past or future?

i know it is impossable to survive one but if you could would u end up in a different time?

Answer 1

We don't know where you would end up. When we try to solve the mathematics of what could go on inside the event horizon (the distance from the black hole where the escape velocity is equal to the speed of light), our equations try to tell us that time and distance do not behave the same way as they do in our universe.

That's it.

From that point on, you can speculate. One version says that you could move through "time" forward or back, but you would have no choice in "space": you would fall towards the centre of the black hole.

So, in essence, because we do not know what goes on, then if you say you could move through time, we cannot prove you wrong. However, if you do, then the equation that says you could also says that it would be useless as you would be stuck inside the black hole (no freedom to move through space)

Answer 2

Thank God yahoo puts a limit on your answers Dan----- here is a person who self proclaims that he doesn't understand physics and uses science fiction movies and Star Trek ( ! ) to form a base for his theories on the aspects of time travel. Obviously Dan should do more learning before attempting to teach. Start with the theory on time dilation.


Pure science fiction and fantasy. Humans have always been intrigued with the subject of time travel so when black holes were discovered and were yet to be explained some kooks came up with the notion of warping through time and space. A black hole is a sun which has gravitationally caved in upon itself. Think of travelling into the middle of our Sun and warping out somewhere else. Is it possible? Of course not. A black hole is no different. It just has more gravity than our Sun. It is still just a ball in space. How many times would you have to travel in and out of a ball before you realized that it was a ball? Wormholes are a different story although none have been discovered.

Answer 3

I agree with cosmo on the text book definition of a black hole as being nothing more than an imploded sun (star). The far more interesting question : "Is time travel possible" ; is something we can all speculate and debate about. I say IT IS, but not in any possible physical way. Only in our minds via our memories and studies of the past; or in our imaginations and actions that determine our futures.

Answer 4

No. Time travel is not possible, because the past and the future are not "places" where you can "end up." You can't go to the past because it no longer exists, and you can't go to the future because it doesn't exist yet.

Most theory that has to do with black holes and space variations in and around them is the result of a bunch of undergraduate physics majors getting drunk and pulling an all-nighter, and trying to outdo each other in explaining the unexplainable.

But sorry, there is no time travel. It is simply not logical.

Answer 5

Sort of. Not in the sense we all grew up hearing about it.
By traveling faster than someone else you tend to age slower. Only by a few milliseconds.

According to our current understanding, no, time travel is not possible.

We can see back in time. Also not in the sense of history, but universe-wise. Our universe is expanding all the time. Galaxies closer to the "center" of the universe are farther away from us. Light travels for millions of years before we can see it. So when we look to a distant galaxy we are looking back in time.
Nifty isn't it?

Answer 6

Yes,

Read my best answer for this question: http://answers.yahoo.com/question/index;_ylt=AqXt1VKXcn8cJ8uGQ1Qh5iXty6IX?qid=20070809230951AAQEPrD&show=7#profile-info-AA10219770

Your are right it requries are revolving black hole and traveling too close to it to survive with current technology.

You will also want to check out my answer for this: http://answers.yahoo.com/question/index;_ylt=AlmbR.VHZfXwfCnX6G14kvjty6IX?qid=20070809000051AAhB7WR&show=7#profile-info-ae64cd2ae43b0a7fcd3d51ae9efe70f5aa

I didn't win best answer for this question, but I covered time travel: http://answers.yahoo.com/question/index;_ylt=Ag1_Ta_576ylXn.E49ofnczty6IX?qid=20070806193327AAz4tV7&show=7#profile-info-EmcD4Xtkaa

I am sorry that I didn't write out a huge explanation, but I don't have the space to write it all out. Yahoo puts a limit on my long answers. You are not the only person who has asked about this.

I don't understand the physics myself, but basically if you put a black hole into rotation around a point in space that point of stressed space time could allow time travel. I don't think it will work well though, you may not be able to return, you may not be able to change history, or several other reason. Currently, we can't even get to a black hole and without artifical or gravity canceling systems we wouldn't survive the stress of getting that close to a black hole so, for now the question is unanswerable.

Answer 7

There are probably many dimensions of reality...

I do not believe black holes have anything to do with time travel.

Answer 8

as i have heard it often, if u go at speed of light[300000 km/sec] u
would travel through time.
but it needs infinite energy to obtain that speed and to maintain it.
that amount of energy is not available on earth!!!

just heard!!!!!

Answer 9

I've heard possible but not survivable.

Answer 10

No its not