Time Travel? possible?

[speedofsound]

Well I always wondered if in the future someone found a way to go back in time, and just keeps doing it, changing history all the time. Since we wouldn't notice the changes (previous alternate history would not have ever existed in our memory so nothing to forget or remember). The history we know right now may have just been made.

 

 

 

 

 

 

 

And there in-lies the paradox...

 

 

 

 

 

 

 

If you go back in time and kill you grandfather, what happens to you?

[masterdez]

 

 

If you could somehow manage to get a minus speed, then I think that would be travelling backwards in time. Question is, will it ever be possible?

 

 

 

 

 

 

 

No such thing, speed is infact velocity. Velocity is a vector, has a direction (speed is merely the magnitude and is always positive). So there isnt really such thing as a negative speed as you are suggesting

 

 

 

 

 

 

 

Just as there isn't a negative temperature. You reach absolute zero and there's no colder or slower you could go.

 

 

 

 

 

 

 

Yea, the "proper" temperature scale is Kelvin, and starts at absolute zero (which, just as a side fact, is impossible to reach) and is where the atoms are stationary. You cant make these atoms move backwards or vibrate in a different way or direction. This would be like having negative energy, or would it?

[megakiller32]

No, i remeber doing an essay on this, but the only thing i remeber of it is for some reason, you can only travel back to the time the time machine was invented. :uhh:

 

 

 

Definitly not possible unless your a magician though :

[darkmage099]

If anyone feels like reading a good book over Christmas break - I recommend ch-Redemption-Christopher-Columbus-Orson/dp/0812508645/sr=8-1/qid=1165351513/ref=pd_bbs_sr_1/105-6915079-7199629?ie=UTF8&s=books]Pas[bleep]ch by Orson Scott Card. It's a real interesting approach to the consequences of time travel.

 

 

 

 

 

 

 

I enjoyed his Ender's game series. Although I have only read two of his books (one of them twice), I still think he is an excellent author.

[masterdez]

No, i remeber doing an essay on this, but the only thing i remeber of it is for some reason, you can only travel back to the time the time machine was invented. :uhh:

 

 

 

Definitly not possible unless your a magician though :

 

 

 

 

 

 

 

How did you think you could travel backwards in time?

[Guest GhostRanger]

 

If anyone feels like reading a good book over Christmas break - I recommend ch-Redemption-Christopher-Columbus-Orson/dp/0812508645/sr=8-1/qid=1165351513/ref=pd_bbs_sr_1/105-6915079-7199629?ie=UTF8&s=books]Pas[bleep]ch by Orson Scott Card. It's a real interesting approach to the consequences of time travel.

 

 

 

 

 

 

 

I enjoyed his Ender's game series. Although I have only read two of his books (one of them twice), I still think he is an excellent author.

 

 

 

 

 

 

 

He's fantastic. You should check out "Ender's Shadow," it's the same story but it follows Bean instead of Ender.

[darkmage099]

 

 

If anyone feels like reading a good book over Christmas break - I recommend ch-Redemption-Christopher-Columbus-Orson/dp/0812508645/sr=8-1/qid=1165351513/ref=pd_bbs_sr_1/105-6915079-7199629?ie=UTF8&s=books]Pas[bleep]ch by Orson Scott Card. It's a real interesting approach to the consequences of time travel.

 

 

 

 

 

 

 

I enjoyed his Ender's game series. Although I have only read two of his books (one of them twice), I still think he is an excellent author.

 

 

 

 

 

 

 

He's fantastic. You should check out "Ender's Shadow," it's the same story but it follows Bean instead of Ender.

 

 

 

 

 

 

 

I have already read that. I am looking to read some of his other books next semester. At the moment, I am reading Great Expectations for school. It is definitely better than A Tale of Two Cities. Then again, that is not saying much.

[runemetsa]

Even if you could go back in time, anything that you would do would case massive changes > butterfly effect. I think that the universum couldn't handle that.

 

 

 

And if someone would invent a time machine, and then go back in time and tell to him/herslef how to build it, wouldn't the machine invent itself then? Like, no one invented it then.

[LGBR]

 

And Ghost, I'm not sure I fully understood your post now that i re-read it but yes you're then talking to a person who's 0.02 seconds in the future. 8-)

 

 

 

 

 

 

 

Alright...so he's .02 seconds in the future. Is it possible to explain what that means exactly? If he's .02 seconds in the future - how am I talking to him?

 

 

 

 

 

 

 

Noone is that far into the future,astronauts are like a few MILLIONTHS of a second in the future

 

 

 

 

 

 

 

Basically if you were to travel around the world 1 time in a space shuttle which had a timer in it and a timer outside of the shuttle , when you got back the timer inside the space shuttle would be ahead of the timer back at the space station, just barely though

 

 

 

 

 

 

 

Its based on the Theor of Relativity, lets say I was 5 secondsin the future and you came up to me and say hi, by the time you even got up to me you would of already of said hi to me but for you it wouldnt of even occured yet

[rocketman089]

 

 

 

Basically if you were to travel around the world 1 time in a space shuttle which had a timer in it and a timer outside of the shuttle , when you got back the timer inside the space shuttle would be ahead of the timer back at the space station, just barely though

 

 

 

 

 

 

 

Not trying to be a time nazi, but a space shuttle and space station travel at the same speed (unless theyre at different altitude). There'd be no time difference. If the second time reference was somewhere stationary on earth, then yes, you're right.

 

 

 

 

 

 

 

(omg, does anyone here play Orbiter??)

[Diminished2b]

If time is linear, then that is in fact proof that there will be no time travel.

 

 

 

 

 

 

 

It depends of what interpretation of time that you use, honestly.

[rocketman089]

I think the simplest way to put it in an Einsteinian way is this: Space corralates with time. If you move faster through space, you move faster through time. It's really all arbitrary when talking time travel by astronauts though.

 

 

 

 

 

 

 

makes yer brain itch

[masterdez]

If time is linear, then that is in fact proof that there will be no time travel.

 

 

 

 

 

 

 

It depends of what interpretation of time that you use, honestly.

 

 

 

 

 

 

 

^ i like that

[LGBR]

 

 

 

 

Basically if you were to travel around the world 1 time in a space shuttle which had a timer in it and a timer outside of the shuttle , when you got back the timer inside the space shuttle would be ahead of the timer back at the space station, just barely though

 

 

 

 

 

 

 

Not trying to be a time nazi, but a space shuttle and space station travel at the same speed (unless theyre at different altitude). There'd be no time difference. If the second time reference was somewhere stationary on earth, then yes, you're right.

 

 

 

 

 

 

 

(omg, does anyone here play Orbiter??)

 

 

 

 

 

 

 

when i said space station I meant this thingie-

[cyco]

It will bring back the dates and times in relation to the sun, but nothing would change.

[l0rd]

ok, so your saying that 24 hours automatically pass when you go around the earth in 1 hour (24 thousand mph) then, you would automatically travel through time? no the only thing that would happen is you would be in your starting time zone, and a hour has passed, and you might feel a little nausia because of reaching that high of speeds.

[warri0r45]

thought id ad some more thoughts..

 

 

 

 

 

 

 

i agree with te notion that time can be dilated or distorted with relation to eienstiens theory of relativity etc, but the notion of a 'time machine' or 'time travel' scenario, as seen in movies like the terminator, is impossible, there are just too many paradoxes to suggest it is completely illogical, i.e. going back in time before you were born etc.

 

 

 

 

 

 

 

another revelation - in a couple billion years, when the sun dies (this is inevitable), how will we judge time?, as time is judged by the earth's revolution along its own axis and around the sun i.e. 365 days = 1 revolution around the sun, 24 hours = 1 day = 1 earth revolution around its axis and so on and so forth until you divide seconds in a decimal fasion.

[jemathonical]

Time travel will never happen. How i know this.......

 

 

 

 

 

 

 

If time travel did get invented in the future, the time traveller will have already come back and time and told us about it. And so far, no one has come in screaming "Guns will kill the whole world in 35 years!"

[warri0r45]

and if people from the future did come back (reminds me of a south park episode - they took our jobs!! :lol: ) to warn us of the dangers in future, it wouldnt change the situation for the time traveller's population of people, but if it did and if we were warned and changed our present day action to avoid, say, a war, then, by logic, those from the future who died in the war should come back from the dead :lol:

 

 

 

 

 

 

 

besides, no one can come from the future, because it hasent happened yet, unless theres some super-freaky parallel universe thing going on.

 

 

 

 

 

 

 

i think all the above makes sense, just dont take my word for it :lol: :P

[BenBru]

Time travel will never happen. How i know this.......

 

 

 

 

 

 

 

If time travel did get invented in the future, the time traveller will have already come back and time and told us about it. And so far, no one has come in screaming "Guns will kill the whole world in 35 years!"

 

 

 

 

 

 

 

Well they have.. But they just get thrown in the looney bin.

[rocketman089]

ok, so your saying that 24 hours automatically pass when you go around the earth in 1 hour (24 thousand mph) then, you would automatically travel through time? no the only thing that would happen is you would be in your starting time zone, and a hour has passed, and you might feel a little nausia because of reaching that high of speeds.

 

 

 

Yeah, what the hell do NASA and the ESA know?

[Nadril]

Time travel will never happen. How i know this.......

 

 

 

 

 

 

 

If time travel did get invented in the future, the time traveller will have already come back and time and told us about it. And so far, no one has come in screaming "Guns will kill the whole world in 35 years!"

 

 

 

 

 

 

 

Time traveling through the past, is. Traveling to the future is a whole other story however.

[warri0r45]

jemathonical wrote:

 

 

 

Time travel will never happen. How i know this.......

 

 

 

 

 

 

 

If time travel did get invented in the future, the time traveller will have already come back and time and told us about it. And so far, no one has come in screaming "Guns will kill the whole world in 35 years!"

 

 

 

 

 

 

 

 

 

 

 

Time traveling through the past, is.

 

 

 

 

 

 

 

according to crrent physics, im pretty sure you cant exist in the same point in space-time twice. know why they call it a continuum? because it keeps going, pretty sure it dosent go backwards.

[Tigra00]

It seems a lot of people don't get it.

 

 

 

 

 

 

 

The whole 0.2 seconds into the future thing? It's nothing more than the guy technically being ahead in time by 0.2 seconds. MAN-MADE time.

 

 

 

 

 

 

 

Time is a subject MADE by man.

 

 

 

 

 

 

 

The real time travel lies in traveling through Space-Time, which to me, makes NO logical sense because time is said to be linear. But who knows.

[runemetsa]

 

jemathonical wrote:

 

 

 

Time travel will never happen. How i know this.......

 

 

 

 

 

 

 

If time travel did get invented in the future, the time traveller will have already come back and time and told us about it. And so far, no one has come in screaming "Guns will kill the whole world in 35 years!"

 

 

 

 

 

 

 

 

 

 

 

Time traveling through the past, is.

 

 

 

 

 

 

 

according to crrent physics, im pretty sure you cant exist in the same point in space-time twice. know why they call it a continuum? because it keeps going, pretty sure it dosent go backwards.

 

 

 

 

 

 

 

Wrong actually. In newton's time theories he never definied that time would only go forwards. It also could go backwards, but no one would notice it as the time would remove things that already happened.

 

 

 

Also, when it sometimes feels that "time flies", how do you know that it isn't just a feeling?