Time Travel possibilities?

Even light has a finite speed; how many minutes does it take for sunlight to reach earth.

Time does not exist objectively at all but is merely a function of the human mind. "In other words, what we experience as time is nothing more than the way our mind orders events so that we can make sense of our experiences."

Brennan

Actually an eminent physicist (I believe it was Kip Thorne) got so tired of being asked about time travel that he sat down and attempted to definitively show it could not be done. He expected that to be the case so was surprised to find he could not show it was impossible.

That being said time travel backwards in time has a variety of issues not the least of which is the formation of paradoxes (the classic being you go back in time to kill your grandfather before he met your grandmother so therefore you could not be born and therefore you could not go back in time to do this). There are maybe some ways out of those paradoxes if we assume parallel universes but that is another tough one to buy into. As such, most scientists figure there must be something preventing it but they just cannot quite show what it is preventing it yet.

The concept of a time travel machine has already been thought up though. Basically you manufacture a wormhole then take one end and put it on a space ship and fly around at near lightspeed. You will travel in time more slowly than those left on earth. When you return it may be some few thousand years in the future. Now, if you jump through the wormhole you will go back to roughly the time you left (or some few days later but close enough).

Note this means if time travel is invented you can only go back as far as the point at which it was invented.

It should be noted that no one has seen a wormhole, building one you can jump through would also take negative matter (which no one has ever seen), just jumping through it may collapse the wormhole as your mass destabilizes it and the energy necessary to make one is so off the charts it'd almost certainly vaporize you if you were remotely close to it.

Those small problems aside though then sure! It'd work! It is just practically impossible and not actually impossible! ;-)

Probably not, though the sci-fi nerd in me will always hold out a little bit of hope, haha.

But really, there's too many barriers to time travel. There's problems with adding matter to the universe, the possibilities of altering the timeline, and the fact that as far as scientists can figure, stepping back in time even a fraction of a second would require as much energy as an average star produces in its entire lifetime.

EDIT: ----------------

No, it can't be sped up to travel faster than light. Nothing can go faster than the speed of light. The speed of light is a universal speed limit. Besides, as something speeds up, time slows down, time doesn't flow in reverse as you speed up, so even if it could be sped up faster than light that wouldn't send it back in time.

Theoretically yes through wormholes if they exist. Doubt it though. You could travel into the future by trveling at the speed of light. If you traveled to somewhere and back tot earth and you traveled at the speed of light for one hundred years when you get back you'll be a couple 10 thousand years in the future. It's like 2 people watching a movie and then u put a slow motion on 1 person. to that guy in slow motion he is watching the movie at normal speeds, but is really moving in slow motion relative to the guy watching it at normal speeds.

I believe I read a few months ago in Astronomy Magazine a few or more months ago that it has been done at the subatomic level. But not at the level you are asking about. May never reach that level due to the amount of power that would be needed even if we could work out all of the other problems. And if the Timelords allow us.

I'm sorry, but the idea of going back in time, is not possible.

You cannot go back to whats been done already, there is more chance of travelling at light speed, without being killed. You cannot go back, no matter what.

As far as we know, no it isn't. There are some calculations that indicate a relativistic 'time machine' of some kind could exist, but it's not clear that building one could possibly be feasible, or that it would have any useful application.

There are two short papers following that give a definite answer as to the possibility of time movement. Because all forms of mass and energy are formed of physical time 'c', all that exists to mankind is present time.

Theory of Everything

(c) 2008, D. Ertle

The THEORY OF EVERYTHING allows a person to understand the basic laws of creation from a single vantage point. There is no need to use multiple partial theories to gain a perspective concerning the basis of everything physical. It appears the equation c = h is able to do that. The value of speed “c” also describes a particular value of energy “h”.

In the equation E = mc^2, a person may wonder why an acceleration of mass would equal that of a particular value of energy, or why in the equation for a field of gravity, c^2 = E/m, the end result is that of a particular speed, when in fact the force of gravity performs work. It expresses a particular value of velocity “c” to the exclusion of work energy “h”. The Physics Trilogy describes the basis of creation, the values God used in the formation of our physical universe.

The trilogy is:

m = E/c^2, and E = mc^2. The basis of each of the first two equations is that of physical time “c”, a duration of physical existence. Notice that mass and energy are able to change value in these equations, but the value of “c” (time) does not change value. When multiplying mass times that of the constant “c”, the value of “h” is automatically given it, converting “c” to “h”.

c^2 = E/m. This third value of the Physics Trilogy is that for a field of physical time, or that of a field of gravity. The “c^2” describes that the energy of “h” moves at the speed of light “c.

At http://youtube.com/ there is a video “Gravitational Constant” that may be of interest to the reader. There are other science videos also by “Stcorridon”. For information on science concepts, visit “youtube.com” and look at gravity engine 1 and 2. I think there are about fifteen separate information videos under the name of Stcorridon.

When Time Does Not Exist

© 2009, D. Ertle

The basis of our physical existence is that of the value ‘c’, a particular velocity. The first two parts of the Physics Trilogy: m=e/c^2, and e=mc^2, are the basis of our existence. The values of mass and energy change, but that of ‘c’ does not. Notice that time exists only in the presence of a mass. Were mass to be described as t^3 or as c^3, such would be a correct expression of that of both time and mass.

c^2=e/m, describes a field of physical time, or that of a field of gravity. The value of ‘c’ alone is able to be described as ‘c=h’. The value of ‘c’ being that of distance in a second, and that of ‘h’ being a particular value of energy, also found within a second of existence. Both are constants and exist together as a single entity. When there is an increase of time, there is an increase of energy. When there is an increase of energy, there is an increase of time.

Physical time is that of distance traveled in a particular amount of time. But, what if time (distance) were to be reduced to zero? In such a case there would exist no physical time. This is how it is done. To find when time does not exist, multiply time ‘c’, and the energy of time ‘h’, by 0.5, 82 succeeding times, by this means the physical distance of time within a second is reduced to zero. The value of ‘h’ we seek is that found according to c^2/h. This gives us the nearest value to zero time possible.

To further understand the extreme smallness of the duration of physical time, after its speed has been reduced 67 times, the length of time is reduced to 2.031472712 -12 meter, which is near the duration of an electron wavelength. It requires 15 further reductions in order to reach the value of having no length at all, other than one (1).

‘c’ becomes 5.95532797 -17 meter, and ‘h’ becomes 1.370265217 -58 Joule; these values are determined after 82 succeeding steps. At this time c=h becomes (t=1) = (h=1), each having the value of ‘h=1’. (t=1)=(h=1) has become: time without energy, and energy without time.

Time travel is possible.

I know because I wrote this 53 years from now.

On the off chance that it turns out that it IS in fact possible to send information intact back in time.....

At the weekend, could someone please send next weeks winning lottery numbers back to me so that I receive them tomorrow, in time to enter the draw.

Thanks.

(P.S. just to be sure, could they also send any future rollover numbers back also. Thanks again).

haha