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For all we know, we live inside a black hole, as far as we understand the matter in the universe and it's size. The size of the observable universe line up with

For all we know, we live inside a black hole, as far as we understand the matter in the universe and it's size. The size of the observable universe line up with the event horizon of a black hole with the same mass. It may be a coincident. Or perhaps our universe it all there is, and it doesn't expand infinitely, but will begin a pullback at some point leading to a new big bang. Or maybe we're just simple 3d beings, and the universe is really multi dimensional. Or even more mind boggling, we're just a simulation. None of the above explains what is outside, nor does it answer your question. What I'm trying to paint, is that we will probably never know. But we do know that being happy feels good, so just focus on that, because that is the meaning.

brokenmachine 7y ago
>For all we know, we live inside a black hole, as far as we understand the matter in the universe and it's size. The size of the observable universe line up with the event horizon of a black hole with the same mass. It may be a coincident. Is that true? I thought the whole reason they came up with dark matter was that the universe was expanding faster than the amount of detectable matter inside it would suggest.
- antepodius 7y ago
  That's dark energy. Dark matter would slow down the expansions of the universe, and they came up with that to explain the rotation curves of galaxies: they're flat- all the stars in e.g. the Milky way go around the center in the same amount of time- but that shouldn't be the case going by just the matter we can see. Ergo, dark matter.