26 Answers
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There are other universes that fill the same space, just as there are other radio stations that fill the same air.——Certain key attributes of Particles that make up atoms, may vary in “Frequency” (or some other quality). and are thus Interactive or” REAL” only to other particles or atoms made from them that MATCH in this “Frequency”—-Thus each SET of such atoms interact and make their own UNIVERSE.——More or less similar, in that they have stars, planets and Galaxies, etc., but no “Twin Earths” or Duplicate copies of ourselves—-Just simply OTHER universes.
There may be MANY of them, but They are not infinite in number, Only as many as there are available different “Frequencies” of matter/Particles—-Below or above a certain frequency range, the dynamics of the waves that make up matter may not function properly to make universes.—-Just as EMF waves that are too slow or too fast are unsuitable to use as radio carrier waves.
Different universes would be non -interactive, and not real relative to other universes or their inhabitants.—HOWEVER they might make their presence known as “Dark Matter”–relative to an observer from another universe. Perhaps the “dark matter” we observes the effects of as “gravity that should not be there” is how we experience other universes parallel to us.
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I hope so
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Yes, I believe that there are infinite universes.
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Here is an answer I gave to a similar question a while back …. it explains the rationale by physicists for various multiverse possibilities – pick one you think makes sense or none. At least you will understand the rationale.
There are at least 4 types of multiverses proposed. Each has a different basis for belief by some scientists.
If we assume that the universe is infinite (at least stupendously large) as would be indicated by measurements that the universe is flat, then there is a statistical argument for different REGIONS of the universe to be treated as if they were parallel universes. If you take a region of space (e.g. our visible universe) and compute all possible combinations of quantum states, a very large or infinite universe will have multiple ‘copies’ of the same combinations, plus innumerable statistical variations. So, multiple copies of you, and multiple slight (or large) variations of you. While not multiverse in the traditional sense, you don’t need weird theories for this, just a large or infinite universe and combinatorial calculations.
Inflation gives rise to another concept of a multiverse in the more usual sense, multiple separate universes in some sort of ‘bulk’. This is based on the idea that inflation is a process that never stops. Since our universe was born out of a very powerful inflation, this implies that the inflation is not a one of event, but happens often (obviously the details aren’t that simple)
Another multiverse comes from the many worlds interpretation of quantum mechanics, where different quantum choices lead to many superpositions of possibilities which lead to multiple threads of realities where each thread is ‘real’ to everything on the thread. So, in the double slit experiment, a particle goes through one slit in one thread, and the other slit in another thread. Same spacetime but different entangled threads. This is just one of many interpretations of quantum ‘reality’ but there is currently no evidence to support it any more than the other reality interpretations.
Another interpretation comes from the string and m-theory. They have the unfortunate problem of failing to explain how the 10^500 possible configurations of the extra dimensions which define the laws of physics lead to our universe which is just 1 out of 10^500 possibilities. They have snatched victory out of the jaws of defeat by proposing ALL of these configurations (physical laws) happen randomly, and our universe is just one of these. Of course, string theory is in trouble and the multiverse seems contrived.
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Not exactly because it depends on how you are using the word “believe.” . The existence of other Universes is a hypothesis that makes sense mathematically based on some scientific models. But to “believe” there are other universes the models would have to be supported by some evidence, instead they are only hypothesis that may never be proveable.
So a reasonable person can not believe something is true without sufficient evidence. Using a more common usage of believe, meaning to speculate than yes it is possible to speculate on the existence of other universes.
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If there were, they’d be part of the universe.
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Yes, I do.
When you look at the splendor and diversity of something like a Universe … you probably won’t stop at just one.
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I have no belief that there are, or that there are not.
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No, but it is a possibility indicated in some branches of mathematics and physics.
Someday it may be possible to test these ideas, but until then, they are unavailable and are therefore not even hypotheses, let alone something worth accepting.