What is observable is constrained by cause and effect. To see something, information must come from there to us. That cause and effect relationship cannot happen faster than lightspeed.
We therefore have no evidence for anything other than the observable universe. Claims about anything else run into Russell’s teapot issues. We can speculate, but it’s ultimately nothing more than a story.
The observable universe is constantly expanding as the passage of time allows light to reach us from more and more distant parts of the universe. So it’s less “we don’t know what’s outside” and more like (to a certain extent) “we have to wait and see.” And there’s nothing we’ve seen to indicate that these external regions that are being revealed are anything but more of the same kinds of things in our inner region of the observable universe.
What is observable is constrained by cause and effect. To see something, information must come from there to us. That cause and effect relationship cannot happen faster than lightspeed.
We therefore have no evidence for anything other than the observable universe. Claims about anything else run into Russell’s teapot issues. We can speculate, but it’s ultimately nothing more than a story.
The observable universe is constantly expanding as the passage of time allows light to reach us from more and more distant parts of the universe. So it’s less “we don’t know what’s outside” and more like (to a certain extent) “we have to wait and see.” And there’s nothing we’ve seen to indicate that these external regions that are being revealed are anything but more of the same kinds of things in our inner region of the observable universe.
Bro doesn’t believe in dark matter because he can’t see it
We can measure its gravitation.