If time travel existed...

[Leros]

Originally posted by: So

Originally posted by: txrandom

Originally posted by: ShadowOfMyself

Originally posted by: txrandom

Originally posted by: ShadowOfMyself
Well, not exactly.. Remember we dont have time travelling devices yet, so if you travelled to the past you would be stuck there forever... Maybe they only travel back to the point where the first time machine was invented so they can go back to the future

What if the time traveler traveled to the past in a time machine that came with him. He should be able to go back to the future right?

I really have no answer for that, maybe its only possible to teleport organic matter... I have no idea lol

Btw since we are on this topic Ill take the chance to ask another question... When you are in space travelling at high speeds time goes by slower, right? So... If we had a lightspeed spaceship, and travelled in it for one year, when we came back to earth, people would have age much faster, right? Well, thats technically time travelling into the future or am I missing something?

This is something my Physics teacher talked about. I didn't understand how traveling faster makes time slower. Time is a human-defined constant. There is one second every second. If we walked on Earth for 1 year at 1 m/s and traveled in space at 3 * 10^8 m/s for 1 year, people on Earth would still be 1 year older.

I might be missing something obvious because I've heard this from other sources too.

You have no grasp of relativity whatsoever. I'm not trying to be offensive, and I'm sure you could learn it - you probably had a bad teacher, but you are absolutely, 100,000% wrong.

For instance people who travel in orbit around earth for a few months will have aged 1 second longer than the people who were on earth. This is because the people in orbit were moving faster.

Take this to a higher level. You travel at 0.999c for 3 years. You age 3 years, everybody on earth ages a lot more than 3 years.

 

[So]

Originally posted by: Leros

Originally posted by: So

Originally posted by: txrandom

Originally posted by: ShadowOfMyself

Originally posted by: txrandom

Originally posted by: ShadowOfMyself
Well, not exactly.. Remember we dont have time travelling devices yet, so if you travelled to the past you would be stuck there forever... Maybe they only travel back to the point where the first time machine was invented so they can go back to the future

What if the time traveler traveled to the past in a time machine that came with him. He should be able to go back to the future right?

I really have no answer for that, maybe its only possible to teleport organic matter... I have no idea lol

Btw since we are on this topic Ill take the chance to ask another question... When you are in space travelling at high speeds time goes by slower, right? So... If we had a lightspeed spaceship, and travelled in it for one year, when we came back to earth, people would have age much faster, right? Well, thats technically time travelling into the future or am I missing something?

This is something my Physics teacher talked about. I didn't understand how traveling faster makes time slower. Time is a human-defined constant. There is one second every second. If we walked on Earth for 1 year at 1 m/s and traveled in space at 3 * 10^8 m/s for 1 year, people on Earth would still be 1 year older.

I might be missing something obvious because I've heard this from other sources too.

You have no grasp of relativity whatsoever. I'm not trying to be offensive, and I'm sure you could learn it - you probably had a bad teacher, but you are absolutely, 100,000% wrong.

For instance people who travel in orbit around earth for a few months will have aged 1 second longer than the people who were on earth. This is because the people in orbit were moving faster.

Take this to a higher level. You travel at 0.999c for 3 years. You age 3 years, everybody on earth ages a lot more than 3 years.

Yarr. I still have this bookmarked from the last time AT demonstrated their scientific ignorance

http://www.1728.com/reltivty.htm

.999C, 3yrs -> 67yrs on earth

 

[TheSiege]

what exacly is .999C, is that speed? what is that speed in laymen terms?

 

[So]

Originally posted by: TheSiege
what exacly is .999C, is that speed? what is that speed in laymen terms?

99.9% the speed of light.

 

[TheSiege]

ok so since i am new to this, how fast can a space traveling object move? in theory what results could we see right now if someone was to attempt this

 

[So]

Originally posted by: TheSiege
ok so since i am new to this, how fast can a space traveling object move? in theory what results could we see right now if someone was to attempt this

Pretty simple really:

According to relativity, we can approach infinitely close to the speed of light but not reach it, and the more you accelerate, the more energy you need. Additionally, space is not a perfect vacuum. Even in intergalactic space, the universe it permeated by a tenuous (1 atom in hundreds of cubic kilometers or something) hydrogen gas. So, we could accelerate very, very close to C if we had enough energy. With technology today, we can't even go .01% the speed of light, but with very accurate clocks, we HAVE tested it, and the results have perfectly matched the theory's predictions.

Edit: One of the fastest designs yet conceived, the Bussard ramjet (still completely impractical to build) might be as fast as .16C

 

[DaShen]

I read a synopsis book on time travel written by a physicist in England. She actualyl said a theory that has some merit is that you can only go as far back as the point of conception of the time traveling machine. Since we do not have a viable machine created yet, it is possible that no one can travel back to this point in time.

I actually don't think time travel can happen, but that is more of a belief than any solid evidence or proof. Looking back into time without traveling there can actually happen though. We do that everyday when we look at the stars. So it may be possible one day to capture photons and slow them down to a point where we can store actual events of the past in their entirety as a snapshot of the past, but again it would only start from teh conception of the machine created.

**EDIT**
I mean of course traveling to the past, not the future.

Think of all of the logic paradoxes if travel to the past could actually happen. The physics of the world would be incredibly messed up if we could somehow travel back in time (essentially moving all particles back to a previous state and place) and somehow being free in that system to mess with the parameters. That would essentially null and void anything that really did happen (one tiny change could have a great impact).

 

[destrekor]

so maybe someone from the future visited the Mayans, informed them that they would not need to date their calendar any further than the winter solstice of 2012 for the reason that they saw the world destroyed at that moment and foretold of the events that the Mayans would later predict, and the world will truly change in some grand way on that date?

 

[So]

Originally posted by: destrekor
so maybe someone from the future visited the Mayans, informed them that they would not need to date their calendar any further than the winter solstice of 2012 for the reason that they saw the world destroyed at that moment and foretold of the events that the Mayans would later predict, and the world will truly change in some grand way on that date?

Either that or the priests got lazy and figured the illiterate peasants wouldn't know the difference...

Both seem equally likely to me

 

[async]

Originally posted by: TheSiege
ok so since i am new to this, how fast can a space traveling object move? in theory what results could we see right now if someone was to attempt this

Fastest man made object is helios 2. 70,000 metres a second, or 0.00023 C
At this speed there'd be no relatavistic effects.

experiment to test the theory of relativity with atomic clocks and aeroplanes :
http://hyperphysics.phy-str.gsu.edu/hbase/relativ/airtim.html

"thar tuk r jaaabs" - lol

 

[habib89]

what if they're here right now, and they dress and act like us? or maybe they dont' act like us and we just think they're crazy and lock them up?

also, as stated, time diliation has been proven through experimentation... let's say you're on a ship that goes at almost light speed.. you have a clock.. man made.. maybe it's a alarm clock radio you got from walmart.. who cares.. you board today.. you come back in one year.. you get off the plane, and say "man, that was a long ass year to be flying in space" and the dude says "umm.. sir, it's been eleventy billion years!!!" doesn't matter if seconds, minutes or hours were man made, time is still natural...

 

[So]

Originally posted by: habib89
what if they're here right now, and they dress and act like us? or maybe they dont' act like us and we just think they're crazy and lock them up?

also, as stated, time diliation has been proven through experimentation... let's say you're on a ship that goes at almost light speed.. you have a clock.. man made.. maybe it's a alarm clock radio you got from walmart.. who cares.. you board today.. you come back in one year.. you get off the plane, and say "man, that was a long ass year to be flying in space" and the dude says "umm.. sir, it's been eleventy billion years!!!" doesn't matter if seconds, minutes or hours were man made, time is still natural...

:laugh:

Yet another person w/ no understanding of relativity.

 

[StevenYoo]

Originally posted by: FoBoT
http://www.pics.bbzzdd.com/beta/users/lizard_boy/wanted_time_travel.gif

PUSH IT TO THE LIMIT!

 

[Rob9874]

Originally posted by: DaShen
Looking back into time without traveling there can actually happen though. We do that everyday when we look at the stars.

Exactly. I think that's very interesting. When we witness a star dying, which is 300 light years away, we're witnessing an event that happened 300 years ago.

If someone 300 light years away had a powerful enough telescope, they could see events happening on Earth 300 years ago. Think about that!

 

[digiram]

Originally posted by: Alienwho
And say what? I'M FROM THE FUTURE, YOU'RE ALL GOING TO DIE!!"

There are plenty of homeless nutjobs already preaching that. Are they from the future?

Maybe...

BTW, did OP just came back from watching Meet the Robinsons??

Great flick btw

 

[So]

Originally posted by: Rob9874

Originally posted by: DaShen
Looking back into time without traveling there can actually happen though. We do that everyday when we look at the stars.

Exactly. I think that's very interesting. When we witness a star dying, which is 300 light years away, we're witnessing an event that happened 300 years ago.

If someone 300 light years away had a powerful enough telescope, they could see events happening on Earth 300 years ago. Think about that!

see, but not hear. WTF would they think?

 

[destrekor]

Originally posted by: So

Originally posted by: Rob9874

Originally posted by: DaShen
Looking back into time without traveling there can actually happen though. We do that everyday when we look at the stars.

Exactly. I think that's very interesting. When we witness a star dying, which is 300 light years away, we're witnessing an event that happened 300 years ago.

If someone 300 light years away had a powerful enough telescope, they could see events happening on Earth 300 years ago. Think about that!

see, but not hear. WTF would they think?

"Look at strange creatures that wear cloths and do strange work. Oog don't like that, Oog like to watch fire here by shore next to acid lake"


but seriously, wanna blow your mind? There is a star that is extremely large and powerful 1500 light years away that is on its last years of life, or cold already be dead. One that is powerful enough that the shockwave and heat from the supernova will wipe out everything within 100 lightyears from it, and depending on the situation we could see it in broad daylight with our naked eyes. We could just be playing catchup with the life and a blackhole could already have formed or be forming at its location as we speak.
Crazy eh?

 

[Vic]

All objects move through spacetime at the speed of light c. If an object moves through the physical x,y,z dimensions of spacetime at the speed of light, then it will not move through dimension t (time). If an object has 0 motion to x,y,z dimensions, then it will move through dimension t at maximum speed. In other words, the relative speed of time is the inverse of the speed of movement throught physical space, the faster one moves through space, the slower through time, and vice versa (this has been a long-running joke of mine against Star Trek BTW, when the captain would order "full stop" in space ).
All objects with mass are moving through time, and at different speeds relative to each other, so time travel is possible. But as far as we know, in one direction only. It's a remote hypothesis that faster-than-light travel could result in travel backwards through time, however, mass and speed relative to c are also related, whereas mass increases with speed and at c any object with mass becomes infinitely massive, making further acceleration theoretically impossible. This could be countered perhaps if one could find a way to change the curvature of spacetime itself (hence "warp" drive), however no one has the slightest clue yet as to how that might be done.

 

[waggy]

Originally posted by: destrekor

Originally posted by: So

Originally posted by: Rob9874

Originally posted by: DaShen
Looking back into time without traveling there can actually happen though. We do that everyday when we look at the stars.

Exactly. I think that's very interesting. When we witness a star dying, which is 300 light years away, we're witnessing an event that happened 300 years ago.

If someone 300 light years away had a powerful enough telescope, they could see events happening on Earth 300 years ago. Think about that!

see, but not hear. WTF would they think?

"Look at strange creatures that wear cloths and do strange work. Oog don't like that, Oog like to watch fire here by shore next to acid lake"


but seriously, wanna blow your mind? There is a star that is extremely large and powerful 1500 light years away that is on its last years of life, or cold already be dead. One that is powerful enough that the shockwave and heat from the supernova will wipe out everything within 100 lightyears from it, and depending on the situation we could see it in broad daylight with our naked eyes. We could just be playing catchup with the life and a blackhole could already have formed or be forming at its location as we speak.
Crazy eh?

this is why i hate these threads. i end up thinking about crap like this..sigh

 

[zinfamous]

Originally posted by: Rob9874

Originally posted by: DaShen
Looking back into time without traveling there can actually happen though. We do that everyday when we look at the stars.

Exactly. I think that's very interesting. When we witness a star dying, which is 300 light years away, we're witnessing an event that happened 300 years ago.

If someone 300 light years away had a powerful enough telescope, they could see events happening on Earth 300 years ago. Think about that!

OMG! I just ****** my pants thinking about that.

Also, I think Deja Vu is evidence that we have all time-travelled, at some point, without ever knowing it. Future time travel people invented time machines for the express purpose of screwing with us past time people. What assholes.

 

[So]

Originally posted by: zinfamous

Originally posted by: Rob9874

Originally posted by: DaShen
Looking back into time without traveling there can actually happen though. We do that everyday when we look at the stars.

Exactly. I think that's very interesting. When we witness a star dying, which is 300 light years away, we're witnessing an event that happened 300 years ago.

If someone 300 light years away had a powerful enough telescope, they could see events happening on Earth 300 years ago. Think about that!

OMG! I just ****** my pants thinking about that.

Also, I think Deja Vu is evidence that we have all time-travelled, at some point, without ever knowing it. Future time travel people invented time machines for the express purpose of screwing with us past time people. What assholes.

:laugh:

I'm pretty sure you're joking, because my previous discussions with you have revealed your intelligence, but for people who don't know, Deja Vu is a reasonably well understood neurological phenomenon.

 

[ballmode]

I wouldn't be posting here

 

[So]

Originally posted by: ballmode
I wouldn't be posting here

Well, you would, but you'd have a join date of 1999

 

[Matt2]

Mulder and Scully are going to lock this thread fairly soon.

 

[DaShen]

Proof for you guys