Time travel

[wazzuuup]

Hey to all,

I'm fascinated with time travelling but on Google i wasn't brought too far. I was wondering which theories exist on time travelling and what factors are tied to help explain the topic.

ciao!

[Veritas]

A thereory that really grabbed my attention is that if you travel into the past, you can't change the future. This is because you were already there to cause the event to make this present. For example, if I went back to 1913 and killed an important leader, the future wouldn't change because when 1913 was the present time, I appeared and killed him.

[Freethinker]

Why can we remember the past but not the future?

 

Our existence in time does not seem to be bidirectional.

[Freethinker]

There is also the "theory" that if you go back into time and touch your earlier self, you turn into some grotesque blob. I forget which Schwartzenger movie that "theory" is based on.

[Freethinker]

One good resource is Nova, the PBS program

 

http://www.pbs.org/wgbh/nova/time/through.html

 

The info is quite good and at the bottom they provide links to even more details.

[sanctus]

Originally posted by: Freethinker

There is also the "theory" that if you go back into time and touch your earlier self, you turn into some grotesque blob. I forget which Schwartzenger movie that "theory" is based on.

 

If I remeber right it is the movie "timecop".

[Freethinker]

I think you are correct.

[wazzuuup]

thnx for that website!!!

[CD27]

wazzuuup-and no one else- i have a theory on time travel. basically it says that time travel with the mind is not only possible, but has been done. in fact, you may not know it, but you probably time travel every single day. i will post it here. i do hope you enjoy it.

 

EDIT: Deleted by the moderator because of duplicate posting.

[Freethinker]

Originally posted by: CD27

wazzuuup-and no one else-

Suddenly this is a private chat site?

i have a theory on time travel. basically it says that time travel with the mind is not only possible, but has been done.

Ah yes, the good old '60's. I did mind travel all the time back then! The bigger the doobie, the farther the journey!

[Anthony]

hi everyone re time travel heres somethingthing to think about:

 

if you were to step backward in time say about 1 minute after 1 minute goes by you will step backward again because you did it before therefore being in a ever repeating loop. A simular thing would happen if you stepped forward your arrival would keep repeating.

 

If therefore one accepts that you cant step forward or backward even for the minutest amount of time, HOW LONG IS NOW?

 

Anthanog

[Freethinker]

OK, if for sake of argument we ignore the impossible physics of moving back in time.

 

GR shows an event as it's unique time/space event. Each has it's own X,Y,Z,T.

 

When people talk about "time travel", they seldom address the other three axis, X,Y,Z.

 

If you were to go from X,Y,Z,T to X',Y',Z',T' you would not only move in "time" you would move in "space".

 

Or perhaps if you move to X,Y,Z,T', what would the X,Y,Z, represent? Would it be you CURRENT, T location? Would, as we are in an expanding universe, that X,Y,Z, no longer be on the earth? Would the earth be at X',Y',Z',T' while your at X,Y,Z,T' ?

[Frogon]

I think that you would have to change your X, Y, and Z because the earth is moving and rotating, so if you just changed the T, it would have to be to the exact second years later.

[Uncle Martin]

The sun is moving around the galaxy and the galaxy is moving through the universe. It would be very difficult to know exactly where X,Y,Z will be.

[Freethinker]

Originally posted by: Frogon

I think that you would have to change your X, Y, and Z because the earth is moving and rotating, so if you just changed the T, it would have to be to the exact second years later.

 

You are assuming that in a year, the earth would be back at the same location in the universe. While in reality we would have travelled some distance as the universe is expanding.

[Freethinker]

Originally posted by: Uncle Martin

The sun is moving around the galaxy and the galaxy is moving through the universe. It would be very difficult to know exactly where X,Y,Z will be.

 

Do we even have any reference for locating our existence X,Y,Z in the universe? Is such a thing possible?

[Tim_Lou]

isnt it that universe doesnt have a center?

 

so its not right to say XYZT

 

since a point considers a comparasion to the orgin.