The concept of there being nothing outside of space and time is challenging to comprehend, as it stretches the limits of our current understanding. Our understanding of space and time is based on the framework of general relativity and the laws of physics as we currently know them. These frameworks describe the behavior of matter, energy, and the fabric of space-time itself.
If we imagine a scenario where there is nothing outside of space and time, it implies the absence of any additional dimensions, alternate realities, or other realms beyond our current understanding. In such a scenario, the world would be confined to the dimensions and laws of physics that we currently observe and study.
In this context, the world would still encompass the physical universe, with its galaxies, stars, planets, and everything that exists within it. The laws of physics and the fundamental forces governing interactions between matter and energy would still apply. However, without any external reference or additional dimensions, the notion of what lies "beyond" or "outside" our universe would be undefined or non-existent.
It's important to note that this is a highly speculative scenario, and our understanding of the universe is constantly evolving. The nature of reality, space, and time is still an area of active research and exploration in the fields of cosmology, physics, and philosophy. As our knowledge expands, our understanding of what lies beyond our current understanding may also evolve.