Thread: Paralell universes

could other universes, exacltly like ours, exist? right next to us? could we travel to them? chances are there is a planet just like ours. you could find yourself on another planet! what do you think?

Originally Posted by chamilton333

could other universes, exacltly like ours, exist? right next to us? could we travel to them? chances are there is a planet just like ours. you could find yourself on another planet! what do you think?

There was an interesting article about this in the May, or August, issue of Scientific American.

I watched something about going to different Galaxys but by the the Wormhole i heard it could be impossible

A theory I have seen was, two universes existed at some time but due to irregularities one was drawn into the other which caused the BB,
Who Knows,
As for traveling to one we would need a huge side step in our thinking. or a visit by a Cruten or a Alien to show us the way :wink: :wink:

The Brane Cosmology sounds a bit like a meta-universe with many paralell universes.

But by reading about it it sounds like gravity could seep through and might cause similar structures at the astronomical level like galaxies and perhaps even planets, but in such a case a parallel earth would probably not contain duplicates of each person living now, it might not even have human equivalents, it would just be a similar planet like there are probably millions of in our universe without any of them having identical individuals as ourselves that look and are named the same, writing in an alternate version of a forum. :-D

The thing Im not sure about that cosmology is that if much of gravity seeps to paralel universes wouldnt there be whole lot of black holes (as stars would attract gas in paralel universe to their equivalent location, probably forming paralel stars, having a much greater effect on other paralel universe until you have many stars in an equivalent location so that if gravity from all those syncronous stars would seep through paralel universes all those stars would colapse into blackholes without having enough mass indivisually, and so I would expect there to much more black holes than stars, Im just drifting)

The idea of paralel universes is very appealing though.

Doesn't String Theory predict that there are many parallel universes? Most likely the term 'parallel universe' is just a way to describe a form of energy that cannot be directly manipulated by us but still exists in our space-time.

Yes, String theory...there's an interesting book by Michio Kaku about Parallel Universes.

I'm pretty sure string theory says that there are a certain number of universes and they are all seperated by dimensions that we don't know about yet (4thm 5th, 6th...) and it's kinda like thinking of our 3D universe being a 2D piece of paper, there could be another piece of paper on the stack but we wouldn't know about that since the piece of paper universe that we live in is 2D and we've never had to so we never tried moving with depth... or that's what I've heard at least..

It all started in 1957 with a man named Hugh Everett and his PhD thesis. The foundation of the many-worlds interpretation of quantum mechanics (parallel universes) rests on the interpretation that when a "particle" is given a "choice," it actually goes both ways - one way in our universe, and another way in a parallel universe. Moreover, this process actually creates the other universe. This is a simplistic explanation of course!

You might find the "Young double slit" experiment interesting.

Of course, the parallel universe interpretation is not the only interpretation of QM. Furthermore, it is not testable - which makes it useless to science. BUT... it is a lot of fun to think about!

A book for the layman I found enjoyable is
"In Search of Schrodinger's Cat" by John Gribbon

Keep thinking,
w

Originally Posted by william

It all started in 1957 with a man named Hugh Everett and his PhD thesis. The foundation of the many-worlds interpretation of quantum mechanics (parallel universes) rests on the interpretation that when a "particle" is given a "choice," it actually goes both ways - one way in our universe, and another way in a parallel universe. Moreover, this process actually creates the other universe. This is a simplistic explanation of course!
Keep thinking,
w

This is simple If this is so then, every thing must be expanding at a truly phenomenal rate. Do you think there is room for this expansion, or are universes given the same choice, and am I given that choice, are my atoms given the same choice? :wink:

well couldnt there be a copy of earth, the solar system, and our galaxy somewhere else? with the amount of matter in the universe it would be possible.

Clever thinking chamilton333 and I guess it IS possible but the chances of it happening are so slim that even Victoria Beckham would be jealous!

Originally Posted by chamilton333

well couldnt there be a copy of earth, the solar system, and our galaxy somewhere else? with the amount of matter in the universe it would be possible.

According to the 2003 article of Scientific American cited above, there are many scientists, among those who believe in infinity, who feel not only that this is possible but that it is a necessity, given the nature of infinity.

Originally Posted by Chucky

Clever thinking chamilton333 and I guess it IS possible but the chances of it happening are so slim that even Victoria Beckham would be jealous!

well, if you think of the immense amount of mass in the universe, it would be highly probable. if you spin a slot machine 15 billion times, you would get many jackpots. and every sequence of anything is just a pattern. if you had a random number generator, it would eventually make a pattern, but it might take 5 million years. it is because of the randomness itself that creates the pattern.

and another interesting question: could there have been many big bangs?

I've read several different explanations of the 'multiple-universe' theory. The major problem with all of them is the lack of test mechanism.

So far they are nothing more than an ad hoc solution to escape the question of "What caused the Big Bang?" I find that very unencouraging.

Originally Posted by Archie

I've read several different explanations of the 'multiple-universe' theory. The major problem with all of them is the lack of test mechanism.

So far they are nothing more than an ad hoc solution to escape the question of "What caused the Big Bang?" I find that very unencouraging.

could the gravity of all that mass pulled on all the other ones in all directions, and pulled them apart!
and that is why the universe is expanding! all the big bangs reaching out to each other, with centillions of lightyears inbeetween!

Originally Posted by chamilton333

and another interesting question: could there have been many big bangs?

This is highly likely, if the universe is a cyclic universe.

Yes, a planet like ours could very well exist. Even though planets like ours are probadly extremely!! rare, but there also an unimaginable amounts of other star systems out there, so statistically another planet like ours somewhere out there in the void isnt that low.

Originally Posted by XvishX

Yes, a planet like ours could very well exist. Even though planets like ours are probadly extremely!! rare, but there also an unimaginable amounts of other star systems out there, so statistically another planet like ours somewhere out there in the void isnt that low.

I think that the odds that there exists another planet similar to ours are astronomically high.