Alternate timelines? Universes?

Question

I've heard some debate the use of the terms "alternate universes" or multiverse, omniverse, etc..., since the universe technically covers everything, but for lack of a better word (maybe alternate timelines?), would you consider the scientific community's view on this subject as more of a possibility or would you say that it is becoming the most probable model at this point?

Rudy · Accepted Answer

Yes, there are different, non-equivalent hypotheses about other universes. 

Regarding the classification, definition, implications and the question about predictability, testability and the issue whether this is serious science see e.g. this article:

"Multiverse Scenarios in Cosmology: Classification, Cause, Challenge, Controversy, and Criticism". in: Journal of Cosmology 4, 666-676 (2010) 
http://journalofcosmology.com/Multiverse7.html

DLM · Answer

Any potential multiverse would be a part of the universe, as the term universe means, "all together, one."   

I think a lot of excited Quantum Physicists got a litle over excited when they arrived at the possibility of a multiverse.   You can prove a lot of things mathematically when you plug in any values you want for undefined terms.  

I'll happily change my mind if physical evidence ever comes about, but don't expect me to hold my breath.

wilde_space · Answer

There are more and more reasons to believe that our universe is just one of many. The word for the whole thing would be "the multiverse". http://en.wikipedia.org/wiki/Chaotic_inflation_theory

Edward Sharp · Answer

I'd say, "one more in a long list of scientific, logical fairy tales". When proof shows up, we'll know.  Until then, we hypothesize.

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Alternate timelines? Universes?

4 Answers