Q&A: Black Holes
What if we, and everything that we have seen are inside of a very
massive black hole and outside of it is a very unknown universe?
We do not have direct information
about what exists inside a black hole, but an expanding, sparsely
populated, but clumpy Universe wouldn't be the first guess of
astronomers. A black hole is an object containing so much mass concentrated
in a relatively small space that light cannot escape. What would stop light
escaping from our known Universe?