The edge of our observable universe is the furthest distance from which light has had enough time to reach us since the Big Bang, which is estimated to be about 46 billion light-years away. However, it's important to note that this does not mean that the universe ends at that point. The concept of an "edge" in the sense of a physical boundary or barrier is not well-defined in cosmology.
The current prevailing cosmological models, supported by observations and measurements, suggest that the universe is either infinite or has a very large but unbounded extent. In these models, space is thought to extend indefinitely, without a specific edge or boundary.
One way to visualize this is to consider the analogy of the surface of a balloon. If you imagine yourself as a two-dimensional being living on the surface of a balloon, the surface appears curved and finite to you. However, if you continue moving in any direction, you will eventually return to your starting point. Similarly, in three-dimensional space, the universe could be curved on a larger scale, and if you were to travel far enough in one direction, you might eventually loop back to your starting point.
It's worth noting that the concept of the "edge" of the universe can be a bit misleading, as it implies an external boundary. Instead, the current understanding is that the universe is expanding, with galaxies moving away from each other. However, this expansion is not like an explosion happening at a specific point in space. Rather, it is an expansion of space itself, affecting the distances between all points in the universe.
In summary, while our observable universe has a limit to how far light has reached us, the overall structure of the universe is believed to be either infinite or extremely vast and unbounded, without a well-defined edge.