Comment by jjallen
4 days ago
What if it wasn't the beginning of our universe or wasn't the beginning of everything, including what is probably outside of our universe?
4 days ago
What if it wasn't the beginning of our universe or wasn't the beginning of everything, including what is probably outside of our universe?
As I understand it (I‘m not a cosmologist by any means), saying that the observable universe began at big bang simply means that anything that happened before the big bang has no effect on what happens afterwards.
There may be other universes out there, with their own big bangs, but that has no effect on ours.
Reading this article, I think they are simply disputing the necessity of singularity inside a black hole, and hypothesize a universe which expands from non-singularity black hole, while staying inside its own event-horizon.
That is how I understood it at least, somebody please correct me if I misunderstood it.
Eh, the thing about the statement there is you're redefining "universe", which is fine, but restating a definition isn't really saying anything new. The literal meaning of "universe" especially with respect to the Latin origins is... well... everything. It may make sense for physics to separate in to separate sets of everything if there's some reasonable justification.
There's the Universe (everything everywhere everywhen), and then there's the observable universe. Most testable theories will be referring to the observable universe.