What is there beyond the universe?
The question is meaningless, because by definition the universe is everything that exists. (Still, I’m awarding you points for asking it!) According to the Standard Model of physics, the universe arose from an event called the Big Bang and has been expanding for some 14 billion years. It is (to use a very old phrase) “finite but unbounded” and has a measurable size. Admittedly our universe is properly referred to as the “observable” universe, and there are speculative hypotheses that ours is but one of an infinite number of other universes, collectively known as a “multiverse,” possibly organized as a higher-dimensional fractal structure. Unfortunately there is no evidence to support these ideas.
