Is Time Travel possible?

Malibu Sunshine

This very clever man thinks so

https://www.youtube.com/watch?v=RnkE2yQPw6s

Tar.Aldarion

Based on our current understanding of physics, no.

Archeron

Sorry, my mistake. It is.

Archeron

Definitely not.

Rented Mule

I time travel all of the time.

I go out for a drink on Friday night and all of a sudden it's Wednesday.

smcgiff

According to current thinking ... Forward yes. Back no. Forward by travelling at or close to the speed of light.

Possibly, backwards to a different dimension per some.

entropi

Awaits post by John Titor...

galwayrush

It'll be pretty basic with Ryanair.

Rothko

Yeah, sure aren't we traveling through time right now?

Promac

You can travel forward in time relatively easily, you just can't ever come back.

Jake Rugby Walrus666

The important thing is to not change anything after you've gone back. If you do then, well it's space time continuum down the swanny. And you've no one to blame but yourself.

Pilotdude5

Surely if time travel was possible it was always possible?

Captain Chaos

Tar.Aldarion wrote: »

Based on our current understanding of physics, no.

Yes it is, for going forward and has been proven over and over again. It has to be factored into GPS systems to get them to work right for a start.

Every person ever sent into space has gone forward in time.

corktina

i told you YES yesterday...

Captain Chaos

Pilotdude5 wrote: »

Surely if time travel was possible it was always possible?

Yes the laws of physics and general relativity allow for it in the forward direction only. Einstein knew this.

Just we could never prove it until we found a way to travel fast enough, ie, airliners and rockets.

MoonDancer

Came across these a while ago and thought they were interesting!

http://www.techeblog.com/index.php/tech-gadget/10-celebrities-who-might-be-time-travelers

http://blog.markshead.com/254/proof-of-time-travel/

AlmightyCushion

Captain Chaos wrote: »

Yes it is, for going forward and has been proven over and over again. It has to be factored into GPS systems to get them to work right for a start.

Every person ever sent into space has gone forward in time.

I don't know about anyone else but I wouldn't consider time dilation to be time travel.

EdenHazard

Captain Chaos wrote: »

Yes it is, for going forward and has been proven over and over again. It has to be factored into GPS systems to get them to work right for a start.

Every person ever sent into space has gone forward in time.

Thats not really going forward in time though is it? Time just slows down for them relative to time on earth.

Captain Chaos

AlmightyCushion wrote: »

I don't know about anyone else but I wouldn't consider time dilation to be time travel.

Same thing really just depends from what side of the dilation you are looking at it from.

Like the 2 atomic clock experiment. Both exactly the same, one stays on the ground and the other is flown around the world. The clocks are brought back together again and the one that stayed on the ground is slightly ahead of the one that flew around the world.

Ramp that up in scale. Get in a space ship that can do 90% light speed, fly away from earth for a year then turn around and fly back. Everyone on Earth would have aged alot more than you have. You have effectively traveled into the future via time dilation.

Malibu Sunshine

MoonDancer wrote: »

Came across these a while ago and thought they were interesting!


http://blog.markshead.com/254/proof-of-time-travel/

Interesting pic from that page

http://blog.markshead.com/wp-content/uploads/2009/10/bridge-time-traveler.jpg

"There is an old photo from the re-opening of a bridge in 194 where one of the people looks like they are dressed in a style that post dates when the photograph was taken. The caption reads: Reopening of the South Fork Bridge after flood in Nov. 1940. 1941"

Check the guy with the shades

galwayrush

Captain Chaos wrote: »

Same thing really just depends from what side of the dilation you are looking at it from.

Like the 2 atomic clock experiment. Both exactly the same, one stays on the ground and the other is flown around the world. The clocks are brought back together again and the one that stayed on the ground is slightly ahead of the one that flew around the world.

Ramp that up in scale. Get in a space ship that can do 90% light speed, fly away from earth for a year then turn around and fly back. Everyone on Earth would have aged alot more than you have. You have effectively traveled into the future via time dilation.

If you start from a still position and could accelerate to 99% the speed of light in about 5 minutes, then de accelerate back for another 5 minutes, 70 years would have passed on earth.;)

smcgiff

galwayrush wrote: »

If you start from a still position and could accelerate to 99% the speed of light in about 5 minutes, then de accelerate back for another 5 minutes, 70 years would have passed on earth.;)

The earth would have moved a fair distance also

LOST IN SPACE!!!

galwayrush

smcgiff wrote: »

The earth would have moved a fair distance also

LOST IN SPACE!!!

That's relativity for you.:D

3ndahalfof6

That is what can happen if you eat too many mince pies.

antodeco

If its possible, the next poster will say:

That scene from a Charlie Chaplin film with the old woman talking into a mobile phone is very strange.

Edit: It worked!

senorwipesalot

That scene from a Charlie Chaplin film with the old woman talking into a mobile phone is very strange.

Malibu Sunshine

senorwipesalot wrote: »

That scene from a Charlie Chaplin film with the old woman talking into a mobile phone is very strange.

Wasnt it proven to be a fake?

Lapin

Time travel used to be possible but its not anymore.

Tar.Aldarion

Captain Chaos wrote: »

Yes it is, for going forward and has been proven over and over again. It has to be factored into GPS systems to get them to work right for a start.

Every person ever sent into space has gone forward in time.

That's time dilation, two subjective viewpoints of speed of time passing, with no objective answer as to which is the 'correct' one. Speed of time passes differently for everybody - not just people in space etc, how minute the change is depends on circumstance. Even standing in an empty field and being close toa building amtters, or more extreme, being on top of a mountain. It is measurable in space in the ISS, a fraction of a second every 6 months. While this is 'time travel' when people say time travel they do not refer to time dilation, nor forward time travel in general. It's not what they mean by it.

RobbingBandit

If it is possible it is only forwards, never backwards.

smcgiff

Tar.Aldarion wrote: »

That's time dilation, two subjective viewpoints of speed of time passing, with no objective answer as to which is the 'correct' one. Speed of time passes differently for everybody - not just people in space etc, how minute the change is depends on circumstance. Even standing in an empty field and being close toa building amtters, or more extreme, being on top of a mountain. It is measurable in space in the ISS, a fraction of a second every 6 months. While this is 'time travel' when people say time travel they do not refer to time dilation, nor forward time travel in general. It's not what they mean by it.

What do they mean, if they don't mean being present in the future past their normal life span?

If you mean jumping into a swirling tunnel and being able to pick certain points in time, then no that's not possible.