Multiverses, wow that's big!

[mpmcd101]

I posted this as a sort of answer to another thread about where does space stop, but the thread was quite old and so I thought I might create a new thread just to see what you all might think, hope that's ok.

Hi Everyone, this is my first time on here, but I love the subject and so would like to share my thoughts, although I'm not sure it's going to answer the question, "Where does space stop".

It depends on whether you believe in the multiverse theory or not. Personally I do. I think it's more than likely that the big bang happened many many times before and after the one that created our own universe and is still happening over and over again like bubbles in boiling water. Our own universe, although very very big, has an edge, a skin if you like, that is expanding. It now seems that it is expanding faster, the further out you go, giving rise to the question why? The answer (so far) seems to be dark energy. I'm not sure I like that idea. That's not to say that it's impossible, but I might be able to explain the faster expansion in a way that doesn't call for a mysterious new entity, but uses good old fashioned gravity.

If you accept that we are not living in a space that has only one universe, but that there are in fact a huge number of other universes out there, it would follow that as each of them expands, their edges would get closer and closer to each other. This would exert a pulling force on the matter nearest the two leading edges, leading to a more rapid expansion as the two edges get closer. Instead of inventing a new force to push from inside, this way, gravity can still be the main protagonist, acting in the same way as it always has, by pulling from the outside.

The only problem I have with the multiverse theory is when they say that each of the other universes must be filled with "other" versions of us, all with slightly different variations. Every possibility that can be realised, is happening somewhere on one of the other earths in another universe. I really don't see why that should be so. I think it's much more likely that the inhabitants of any other universe would have nothing what so ever to do with anything we might recognise. There may be millions of other earth like planets, but there is no other earth, no other you or me. Why should there be a potentially infinite number of universes all filled with the same people, except in one I might be a billionaire and in another I might be tramp. Just doesn't make any sense to me.

In the 1950's, the Miller-Urey experiment created ammino acids in the lab using only very basic materials. Water, ammonia, methane and hydrogen. These at least in our universe are abundant and so the basic building blocks of life can be created very easily in almost any place that has the right conditions, ie. a place for them to collect, a little heat and an electric storm or 2 to get things going. That's not to say that in every case, intelligent life will evolve, or even low level life forms, but the experiment was found to have created over 20 different ammino acids using just these 4 elements, (well 3 plus water). In an infinite universe or better yet a multiverse, who's to say that these are the only combination of elements that could produce such results, and with such a small number of elements to play with, I dare say that every possible combination has been tried somewhere, and if even just one other combination worked, then the resulting life would not resemble you or me in the slightest.

So, where does space end? I don't know. Our space ends on the skin of our universe bubble and will continue to expand indefinitely. In this way, we both have an end, an edge, but that edge is also continually growing, and so not a static position where you can say, here is where it stops.

If you believe in the multiverse, what is each universe in and how big is this medium?

I love the beautiful purpley orange picture of the tendril like formations and distribution of the galaxies in our own universe, and I don't see why this same picture could not apply to the distribution of universes in the multiverse. Nature loves the fractal repetition patterns seen everywhere from humble cauliflower to the distibution of galaxies. It seems likely that this would continue on ad infinitum.

Edited November 30, 2014 by mpmcd101

[hypervalent_iodine]

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Moderator Note

I moved your other posts in the old thread and the replies to a new one, so this is closed.