eli5 What do we know about what’s outside the observable universe?

Question

eli5 What do we know about what’s outside the observable universe?

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Answer 1

We can’t know anything, that’s the entire point of it being outside the observable universe. Its impossible to observe. Now that limit might be moved back in the future, but at that point it won’t be unobservable anymore. We can’t know anything and we can never know anything, other than assumptions.