Time travel

Time travel

 
If you travel in time to the past, wouldn't you be necessarily traveling to a...
 
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Time travel discussion
 
frogpoison
If you travel in time to the past, wouldn't you be necessarily traveling to an alternate past, since the instant you arrive there (wherever "there" is) you are altering not just the past but the future? And if this were possible wouldn't this create an infinite number of pasts and futures? Does Einstein or Hawking or anyone think this is possible? What about travel to the future? How can you experience something that hasn't happened yet? If all or any of this sounds uninformed or naive, please let me know.
           
 
jgrayjor
replied to: frogpoison
Replied To:  If you travel in time to the past, wouldn't you be necessarily trav...
Thats some crazy shit nobody can travel back in time its all in the movies nobody can do that shit
           
 
jed123
replied to: frogpoison
Replied To:  If you travel in time to the past, wouldn't you be necessarily trav...
I was just thinking this same thing as I was on the toilet a moment ago. However, I don't think it's an alternative past you would travel to. It's simply your own past (ie the past of your universe) but at that time, when you arrive in your past, that sparks off a tangent, alternate universe (a la Everett's many-worlds theory) which gets around those pesky grandfather paradoxes. So in your universe your grandfather lived, sired your father or mother who in turn sired you. You then went back and killed your - no, infertilised your - grandfather who in an alternate universe never had kids. History for him would record a stranger who bore an uncanny resemblance to him, heading for his groin area with a pair of garden shears. Or something.

Awaiting my Nobel prize with anticipation
J
           
 
MAGIUS931
replied to: frogpoison
Replied To:  If you travel in time to the past, wouldn't you be necessarily trav...
When u travel back, according to uncertainity (typo), the time line will change do to the act of presence. however if the observer can remain so, then nothing will change. once a choice has been made, within a certain frame of space time, then that past changes, abd the future with it. most likely the traveler will not be able to go back to his home universe and might suffer mental instability or another fate due to infinite possibilities (where as one person is a combination of infinite selves, and vice versus, the very act of changing one might well be dangerous)
           
 
lehmann520
replied to: MAGIUS931
Replied To:  When u travel back, according to uncertainity (typo), the time line...
events in the past are fixed. they cannot be changed because even if you could travel back to try and change something you would find that whatever you try to do is already done. the past exists in its entirety including the future you coming back to change it. your present represents the probability of your future based on the results of fixed events in your past moving as water to a drain toward the conclusion of your life. if it were possible to change the past then probability would become possibility and the wave front would crash like breakers against a barrier reef. the future would be sheer possibility, entropy would collapse and even death would cease to be certain. the laws of our universe prevent this.
           
 
lehmann520
replied to: jed123
Replied To:  I was just thinking this same thing as I was on the toilet a moment...
where are these multiple universes? where do they get their Matter and energy?
the problem with alternate universes based on anomalies created in the past time line seem simple. Remember, time is not YOURS. Your life is lived in conjunction with an entire universe. If you were able to freeze a moment of your life, you would freeze EVERYTHING known and unknown existing at that moment and that's a lot of stuff.
To imagine a whole new universe spinning off of this one, governed by the same physical laws, just because of a causality...its beyond staggering. Where would all the stuff come from? Every atom, every particle would have to be duplicated and arranged in the exact order it was found in the...other universe. think of the energy that would require. If this didn't happen then the 'alternate universe' spun off by the causality would be nothing more than...imaginary. It would have less substance than a bad scifi movie.
           
 
MAGIUS931
replied to: lehmann520
Replied To:   where are these multiple universes? where do they get their Matte...
Universes come in all shapes and sizes, relative sort of..lol life is not lived in conjuction with anything, that is why there are different time frames ....and the plank energy can be found relative to the size of that universe...ever wonder why someone in a 4th type civilization can travel through time with a wristwatch LOL...almost forgot about the 3 dimensions and where it came from and then the smaller ones beneath it....
           
 
MAGIUS931
replied to: frogpoison
Replied To:  If you travel in time to the past, wouldn't you be necessarily trav...
Correct would not be another past as long as you dont make or introduce another wave/particle to the mix, and depends on the frame of reference. i think that its not as complicated as most would deem. we all dont know, we just have what works on the small, versus the big...nothing in between so to speak of. sides the "construction" of the universe so far seems to be that of wave/particle...maby there is something beyound the colors or "flavors" LOL
           
 
lehmann520
replied to: MAGIUS931
Replied To:  Universes come in all shapes and sizes, relative sort of..lol life ...
Life is not lived in conjunction with any thing?...perhaps I used the wrong word, I mean to say that while I'm alive surfing the wave of my present as it moves toward my future, so is everything else. I exist in a universe and the universe exists in time.I am part, a very small part,of the whole picture.
I'll have to look up the Planck energy thing. Though I'm familiar with the term, I don't know what it actually is.
I know you're being funny about the fourth dimension traveler but it is a valid point after all a two dimensional being would be astonished by our three dimensional abilities and perceptions. Perhaps only a fourth or fifth dimensional existence is the only possible way to travel in time. I just don't know how I would ever spot one...
and about those universes in all shapes and sizes...are you serious?
           
 
lehmann520
replied to: MAGIUS931
Replied To:  Correct would not be another past as long as you dont make or intro...
I agree that the whole thing must be far simpler than anyone gives it credit for being. I just wish I understood the connectivity of the whole thing. In my mind, the only thing that seems to be constant is time but whenever I bring it up whole thing gets thrown in the 'infinity bin' which is kind of like throwing a bible on the table and saying, there, that explains everything. I find very little serious discussion on the subject. I always seems to end up arguing metaphysics.
           
 
MAGIUS931
replied to: lehmann520
Replied To:   Life is not lived in conjunction with any thing?...perhaps I used...
Men in black LOL perfect movie reference for something so real oh and since size dosent matter (hahahahaahahah) then you still have 26 dimensional space, 11 dimensional space and sides space and time moving to begin with....bet scotty would know..LOL