The concept of an infinite universe raises intriguing questions about the nature of space and its extent in different directions. While our current understanding of the universe is limited, I can provide some insights based on current scientific knowledge.
Firstly, it's important to note that the idea of an infinite universe is a subject of theoretical speculation and has not been definitively proven or disproven. In cosmology, the prevailing model used to describe the observable universe is the Big Bang theory, which suggests that the universe began as an extremely hot and dense singularity around 13.8 billion years ago. However, whether the universe is truly infinite or has a finite size beyond our observable reach remains an open question.
If the universe is infinite, it would imply that space extends infinitely in all directions. In such a scenario, there would be no boundary or edge to the universe. This concept is challenging to grasp since our everyday experience is confined to a finite world, but it is within the realm of possibility according to certain theoretical frameworks.
On the other hand, if the universe has a finite size but no boundary, it would still not have an end or edge. Instead, it would be analogous to a curved surface like the surface of a sphere but with one additional dimension. In this case, traveling in any direction would eventually bring you back to your starting point, similar to how circumnavigating the Earth would lead you back to your original location.
It's important to emphasize that our understanding of the universe is continually evolving as scientific knowledge progresses. Currently, cosmologists are actively investigating these questions through observations, theoretical models, and experiments. The nature of space, its extent, and whether it is truly infinite or finite are fascinating subjects that remain open to further exploration and discovery.