Is "time travel" possible?

[NiKeFiDO]

Originally posted by: nakedfrog
Yes, I would say if anything is the key, it's quantum physics.

yeah, but im sure its some wierd thing that isnt actuall time travel, but seems like it to us.
stupid physics being all funky

 

[silverpig]

Originally posted by: ElFenix
any time you move at a faster rate than the other people on this planet you are time traveling

i must wonder how they keep the gps clocks accurate due to relativistic time dilation of orbiting?

It's all built into them. They have to compensate for both the gr part of time dilation (they run faster than us because we are deeper in the earth's gravitational field), but also for sr time dilation (they run slower because they are moving faster). The two partially cancel out, but I believe the sr effect is larger.

 

[Gunslinger08]

Originally posted by: matstars
sort of on/off topic what if you go 1000 light years away and take an EXTREMELY HI-RES image of the earth and zoom all the way in, you could see back in time...

You'd have to travel faster than the speed of light to beat the current light waves out to that point.

 

[JulesMaximus]

Just ask Dug777.

 

[gigapet]

time travel could be a simple task for something existing outside the dimensions in which we exist and can percieve.

 

[nakedfrog]

Originally posted by: joshsquall

Originally posted by: matstars
sort of on/off topic what if you go 1000 light years away and take an EXTREMELY HI-RES image of the earth and zoom all the way in, you could see back in time...

You'd have to travel faster than the speed of light to beat the current light waves out to that point.

But it would be pretty sweet to have a Google Earth that spanned time as well

 

[amicold]

Originally posted by: BrokenVisage

Originally posted by: GeneValgene

Originally posted by: HardcoreRobot
i am surprised to not see the black man avatar

LOL

He's been here longer than you, pal.

How'd you rack up 8000 posts in less than a year?

 

[BrokenVisage]

Originally posted by: amicold

Originally posted by: BrokenVisage

Originally posted by: GeneValgene

Originally posted by: HardcoreRobot
i am surprised to not see the black man avatar

LOL

He's been here longer than you, pal.

How'd you rack up 8000 posts in less than a year?

Originally posted by: scorpmatt
nef

 

[YOyoYOhowsDAjello]

Originally posted by: JulesMaximus
Just ask Dug777.

:thumbsup:

 

[DaShen]

Originally posted by: BrokenVisage

Originally posted by: amicold

Originally posted by: BrokenVisage

Originally posted by: GeneValgene

Originally posted by: HardcoreRobot
i am surprised to not see the black man avatar

LOL

He's been here longer than you, pal.

How'd you rack up 8000 posts in less than a year?

Originally posted by: scorpmatt
nef

QFT or Keep traveling back in time and neffing more.

 

[silverpig]

Originally posted by: nakedfrog
Yes, I would say if anything is the key, it's quantum physics.

Probably not. All the time dilation stuff is relativistic, which is a separate branch of physics from quantum. Current quantum physics doesn't really deal with time dilation at all. The only stuff that does at all is particle physics/quantum electrodynamics but that's still really just special relativity tacked onto quantum physics. You can do quantum in a purely "newtonian" regime as well.

 

[geecee]

Originally posted by: davidjaii
its possible, just wait until i build my flux capacitor.

"1.21 gigawatts? 1.21 gigawatts? Great Scott!"

 

[Schfifty Five]

Originally posted by: nakedfrog

Originally posted by: joshsquall

Originally posted by: matstars
sort of on/off topic what if you go 1000 light years away and take an EXTREMELY HI-RES image of the earth and zoom all the way in, you could see back in time...

You'd have to travel faster than the speed of light to beat the current light waves out to that point.

But it would be pretty sweet to have a Google Earth that spanned time as well

Didn't you know? Google is already Beta testing their Google time travel.

 

[OrByte]

Of course its possible

John Titor anyone?

 

[Chiropteran]

Here is how time travel works, explained in a way I hope all of you can "get".


It's the year 2500. You are on earth in your space craft, and you take off. Your space craft accelerates at the rate of 1 lightyear/year per year.

so you travel, with constant acceleration, for 10 years.

Then you switch to reverse thrust to slow down, and constant deceleration for 10 years.

After 20 years you have traveled 100 light years.

Then you turn around and do the exact same thing again, heading back to earth.

Over 40 years you have gone 200 light years... isn't that moving faster than the speed of light?

Well, sort of, not really. You see when you land on earth, it will be the year 2700~, + a bit of time. as if some 200~ years have passed, and it will seem to the people on earth that while you were very close to the speed of light, you did not travel faster than it. While for you, only 40 years have passed- in effect you have traveled some 160 years into the future.

 

[Eeezee]

Originally posted by: everman
Technically it is possible, we think. The reason why we haven't seen any time travellers is because you could only travel back as far as to when the machine was first built. So if you only built the time machine yesterday, that's as far back as you will ever go. Theoretically there may be natural anomolies which have existed for millions of years which could be used to go back farther.

Why?

 

[mercanucaribe]

Originally posted by: gigapet

Originally posted by: ValValline

Originally posted by: gigapet
for all of you that say its impossible.....

please remember if you discussed with someone 1000 years ago the idea of putting someone on the moon they would have said the same thing.

The entire universe is in motion. If you went back in time 1 minute, you would find yourself thousands of miles from the point on the earth you started most likely sitting in the vacuum of space.

We no virtually nothing about the universe and how it works and what or what isnt possible in it. To that extent we barely know anything about our own solar system.
Everything they say is a "fact" about the universe is little more than intelligent speculation.

Are you kidding?

 

[scorpmatt]

Originally posted by: geecee

Originally posted by: davidjaii
its possible, just wait until i build my flux capacitor.

"1.21 gigawatts? 1.21 gigawatts? Great Scott!"

What the hell is a jiggowatt? (that's how they pronounced it in teh movie)

Originally posted by: BrokenVisage

Originally posted by: amicold

Originally posted by: BrokenVisage

Originally posted by: GeneValgene

Originally posted by: HardcoreRobot
i am surprised to not see the black man avatar

LOL

He's been here longer than you, pal.

How'd you rack up 8000 posts in less than a year?

Originally posted by: scorpmatt
nef

 

[techs]

Originally posted by: Eeezee

Originally posted by: everman
Technically it is possible, we think. The reason why we haven't seen any time travellers is because you could only travel back as far as to when the machine was first built. So if you only built the time machine yesterday, that's as far back as you will ever go. Theoretically there may be natural anomolies which have existed for millions of years which could be used to go back farther.

Why?

I think that theory presupposes you need a machine in both the future and the past to be present to enable time travel so you could only go back to the time after the first machine is built.

 

[Eeezee]

Originally posted by: mercanucaribe

Originally posted by: gigapet

Originally posted by: ValValline

Originally posted by: gigapet
for all of you that say its impossible.....

please remember if you discussed with someone 1000 years ago the idea of putting someone on the moon they would have said the same thing.

The entire universe is in motion. If you went back in time 1 minute, you would find yourself thousands of miles from the point on the earth you started most likely sitting in the vacuum of space.

We no virtually nothing about the universe and how it works and what or what isnt possible in it. To that extent we barely know anything about our own solar system.
Everything they say is a "fact" about the universe is little more than intelligent speculation.

Are you kidding?

I agree, anyone who says we know certain 'facts' about the universe should actually be saying 'we have some very accurate theories that help explain things.' We do know a lot about the universe, but the amount of knowledge is infinite. We will never know it all.

 

[DrPizza]

Originally posted by: Eeezee

Originally posted by: everman
Technically it is possible, we think. The reason why we haven't seen any time travellers is because you could only travel back as far as to when the machine was first built. So if you only built the time machine yesterday, that's as far back as you will ever go. Theoretically there may be natural anomolies which have existed for millions of years which could be used to go back farther.

Why?

Well, one way to "build" a time machine, which is theoretically possible involves
A) travelling really fast for a while
Relative to the earth, your time will pass by slower while you're traveling at speeds very close to c
B) something about a wormhole

Later, you arrive back at the earth; 20 years in your time have gone by, but on earth, 100 years have gone by. However, via the wormhole created, you can grab someone from 100 years into the future and pull them to 20 years into the future (your time)

That's a pretty horrible description of how it's theoretically possible; I didn't pay close attention, because it's not something I'll have to concern myself with, except for the part where: Yes, it's theoretically possible, but no, you can't travel back in time to before your time machine (and wormhole) was created. However, if a wormhole naturally exists... then it may be possible to go back in time to well before now, even though we haven't invented a time machine yet.

I'm sure someone can quote and edit my post to make it a bit more coherent and match theory a little better. Thanks.

 

[Scarpozzi]

Yes it is. I've invented a machine that will take you precisely 1 hour into the future in only 60 minutes.

 

[tvbi]

Originally posted by: Chiropteran
Here is how time travel works, explained in a way I hope all of you can "get".


It's the year 2500. You are on earth in your space craft, and you take off. Your space craft accelerates at the rate of 1 lightyear/year per year.

so you travel, with constant acceleration, for 10 years.

Then you switch to reverse thrust to slow down, and constant deceleration for 10 years.

After 20 years you have traveled 100 light years.

Then you turn around and do the exact same thing again, heading back to earth.

Over 40 years you have gone 200 light years... isn't that moving faster than the speed of light?

Well, sort of, not really. You see when you land on earth, it will be the year 2700~, + a bit of time. as if some 200~ years have passed, and it will seem to the people on earth that while you were very close to the speed of light, you did not travel faster than it. While for you, only 40 years have passed- in effect you have traveled some 160 years into the future.

If you spend 40 years away from earth.. the earth then just speed up 200 years? All you did was driving fast in a space craft for 40 years and then go back to the same earth.

 

[DrPizza]

Originally posted by: Eeezee

Originally posted by: mercanucaribe

Originally posted by: gigapet

Originally posted by: ValValline

Originally posted by: gigapet
for all of you that say its impossible.....

please remember if you discussed with someone 1000 years ago the idea of putting someone on the moon they would have said the same thing.

The entire universe is in motion. If you went back in time 1 minute, you would find yourself thousands of miles from the point on the earth you started most likely sitting in the vacuum of space.

We no virtually nothing about the universe and how it works and what or what isnt possible in it. To that extent we barely know anything about our own solar system.
Everything they say is a "fact" about the universe is little more than intelligent speculation.

Are you kidding?

I agree, anyone who says we know certain 'facts' about the universe should actually be saying 'we have some very accurate theories that help explain things.' We do know a lot about the universe, but the amount of knowledge is infinite. We will never know it all.

I disagree that the amount of knowledge is infinite. It's a huge huge huge amount, but not infinite. There are, after all, a finite number of particles of matter (and photons) in the Universe. Therefore, even if there was knowledge associated with every possible interaction of every possible combination of particles in the universe, that would be
(huge number )^(huge number) which is still finite. Or, if there were a billion pieces of knowledge about every interaction, then
1 billion * (huge number) ^ (huge number)
Of course, such a number is well beyond our comprehension, but it is finite.

 

[PimpJuice]

Originally posted by: gigapet

Originally posted by: ValValline

Originally posted by: gigapet
for all of you that say its impossible.....

please remember if you discussed with someone 1000 years ago the idea of putting someone on the moon they would have said the same thing.

The entire universe is in motion. If you went back in time 1 minute, you would find yourself thousands of miles from the point on the earth you started most likely sitting in the vacuum of space.

We no virtually nothing about the universe and how it works and what or what isnt possible in it. To that extent we barely know anything about our own solar system.
Everything they say is a "fact" about the universe is little more than intelligent speculation.

Like what? facts are facts.