What astronomy shows us is a universe with consistent physical "laws" that are consistently observable, like emissions and absorption lines from the same elements and same processes. Like gravity effects that work consistently like we expect. We can look for things that don't appear to fit - and almost invariably end up finding explanations that don't involve different laws of physics, and we refine (rather than overturn) the physics we recognise.
Other universes and the other side of a black hole event horizon may well be different or beyond comprehension (because of the absence of observational evidence), but this universe shows no signs of variability in the laws of physics. Until we have evidence otherwise it remains a very good working assumption the laws of physics of our universe are universal.
Other universes and the other side of a black hole event horizon may well be different or beyond comprehension (because of the absence of observational evidence), but this universe shows no signs of variability in the laws of physics. Until we have evidence otherwise it remains a very good working assumption the laws of physics of our universe are universal.