If we know approximately how long it’s been since the Big Bang, and we know approximately how fast the universe expands/has been expanding, why can’t we get a good estimate on how big the non-observable universe is? Or more specifically, why can’t we figure out the radius on how far matter has spread out since the Big Bang?
In: Planetary Science
What you described is the observable universe, the stars/matter that eminated from the big bang.
You can’t observe the unobservable universe, as the name implies but we have no idea if there is something beyond what we can see or if the obs universe is the whole universe.
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