Seriously thoughtful Is Time Travel possible

[pilotbob]

Originally Posted by montsnmags

It's probably worth pointing out, however, that you probably exclude the relativistic effects of travelling away from the earth at a sufficiently fast speed for a sufficient distance, and then returning the same way, and thus travelling "into the future".

Ah, the Ender's Game method of "time travel". Although I'm not sure this qualifies either since I would say that "time travel" implies that you can return to your time of origin.

Originally Posted by montsnmags

Is it worthwhile at this point to note that an inability to comprehend, fathom or conceive something does not preclude the possibility?

Yes I know. I never said it did. There's alot of things in this world that are fact which I don't understand either.

BOb

[montsnmags]

Originally Posted by pilotbob

Ah, the Ender's Game method of "time travel". Although I'm not sure this qualifies either since I would say that "time travel" implies that you can return to your time of origin.

I would tend to exclude it too, for that reason. I thought you might want to explicitly exclude it, as he does in that link I provided in the other thread on "SF Chronophysics":

http://www.xibalba.demon.co.uk/jbr/chrono.html

Yes I know. I never said it did. There's alot of things in this world that are fact which I don't understand either.

I didn't meant to imply you did. I'm just a pedant for clarity (at least when I'm not clouding the issue).

Cheers,
Marc

[Donnageddon]

Originally Posted by pilotbob

Ah, the Ender's Game method of "time travel". Although I'm not sure this qualifies either since I would say that "time travel" implies that you can return to your time of origin.
BOb

uh... Quantum Leap much?

[Stitchawl]

Is Time Travel possible

It's already been done. Just not yet.

Stitchawl

[pilotbob]

Originally Posted by Donnageddon

uh... Quantum Leap much?

Actually, this is Sam Beckett talking to you right now. I think my next leap will be into a starship captain.

Heck, I would love to travel in time... or even be able to view some other time. For example, if I could just see that Powerball numbers for this week, that would be great.

So, short of traveling to the future by traveling for a few years at light speed and coming back to a place where 100 years have passed... and real theories on time travel being possible?

BOb

[HarryT]

I gave you a reference to a book which discussed this in the other thread, Bob: "Black Holes, Wormholes, and Time Machines". Theoretically, if you have a spinning cyclinder of hyper-dense matter (the fact that it's spinning is important!), by orbiting it you can travel through time - (forwards only, I'm afaid!). Of course, the engineering problems are ... considerable, but if our understanding of General Relativity is correct, it should work.

[Steven Lyle Jordan]

I discount most time travel material as just plain impossible. The multiverse theory I also discount, because it denies the laws of thermodynamics... you can't be "splitting off" new universes (and creating new energy) every instant something changes, and not go to entropy mighty fast. I consider the multiverse theory to mean that there are multiple possibilities of different universes for every change... but once the change is made, a "decision" is reached, and all the possible alternatives collapse into one.

My Kestral novels (and Sol) use a variation of the Alcubierre drive to allow FTL travel... basically, creating a bubble of "speeded-up" time outside of the ship to go FTL, then a second field that encloses the ship and "slows down" time, averaging the two out so the same time passes inside the ship as outside the bubbles.

I consider the idea complete balderdash, really. I only used them because they are part of the "accepted language" of popular SF, up there with transporters and humanoid aliens.

I firmly believe that if time travel were possible, we would have found inescapable signs of its having happened already... most likely in the records of strange or unexpected events, or unexpected outcomes of critical events that would have created a very different reality had they happened as expected.

[HarryT]

You mean things like Dickens' diary saying things like "Another cursed time traveller visited me today. Why won't they leave me in peace to write!" .

[Steven Lyle Jordan]

Originally Posted by HarryT

You mean things like Dickens' diary saying things like "Another cursed time traveller visited me today. Why won't they leave me in peace to write!" .

Maybe more like people with no financial experience suddenly making killings on the stock market, or archaeologists finding cleverly-disguised smart bullets embedded in a dinosaur fossil, or traces of a modern poison in a German soldier at Normandy.

[ahammer]

speaking to multiverse theory. if it is true you may be able to "time travel" by going to a world that is otherwize the same but started later then one one we are in.

also some thorys around time travel only being possable from the time the time travel device is made if this where to be true we would not see any "found inescapable signs of its having happened already"

I like the multiverse thory better as it deals with the killing your one granpa thing better.

thermodynamics only work the way we know of in this world. base on what is lay out in the thory you would have a world where thermodynamics is not the rule... hard to think of but it like a somone from in a 2d world trying to think of what 3d looks like.

it all just conjecter till somone till it true and the porf behind it all does not realy make it so. it realy a big jump but would be cool if it was the case. still not sure how you would even be able to till if it was.

[Steven Lyle Jordan]

Originally Posted by ahammer

thermodynamics only work the way we know of in this world. base on what is lay out in the thory you would have a world where thermodynamics is not the rule... hard to think of but it like a somone from in a 2d world trying to think of what 3d looks like.

That would suggest that the multiverses are nothing like our universe, and someone moving from one to the other would know the difference instantly (like walking froma positive to a negative world).

But the multiverse theory assumes the universes are exactly the same in construct, only following different outcomes to each new event. That means creating a brand new universe, with its concurrent energy signature, from nothing, every instant.

The only way you're going to beat that is to assume there are multiverses that get annihilated at every instance a new multiverse is created, conserving the energy... but thanks to the laws of thermodynamics and entropy, that brings us back to the multiverses collapsing down to one again.

[Greg Anos]

Originally Posted by Steve Jordan

That would suggest that the multiverses are nothing like our universe, and someone moving from one to the other would know the difference instantly (like walking froma positive to a negative world).

But the multiverse theory assumes the universes are exactly the same in construct, only following different outcomes to each new event. That means creating a brand new universe, with its concurrent energy signature, from nothing, every instant.

The only way you're going to beat that is to assume there are multiverses that get annihilated at every instance a new multiverse is created, conserving the energy... but thanks to the laws of thermodynamics and entropy, that brings us back to the multiverses collapsing down to one again.

Not quite true. If instead of one universe created at the big bang, and infinity of universes were created instead, quantum localization could just be jumping from one universe to another, without the thermodynamic requirements....

[pshrynk]

Originally Posted by Ralph Sir Edward

Not quite true. If instead of one universe created at the big bang, and infinity of universes were created instead, quantum localization could just be jumping from one universe to another, without the thermodynamic requirements....

But that brings us back around to the fixed future(s) theory...

[ahammer]

Originally Posted by Steve Jordan

multiverse theory assumes the universes are exactly the same in construct, only following different outcomes to each new event. That means creating a brand new universe, with its concurrent energy signature, from nothing, every instant.

multiverse theory assumes that but I dont see why that has to be the case if we are talking about multiverses. would be nice if we knew all the rules already but there are some things at the small level we still dont understand the rules for. I would not at all be shock if we did not know all the rules at the big level aswell. maybe at a level that is so large and compix it is inpossable for any one human to understand or put togetter. sure that after a 100 years some things we think our set in stone right now will pry be show to be wrong.

[Steven Lyle Jordan]

Anyway, we're talking about time travel, not jumping from multiverse to multiverse, which would not be actually going back and forth in time...