The concept of an "edge" of the universe is a complex topic in cosmology. According to our current understanding, the universe doesn't have a definite edge in the traditional sense. Instead, the universe is thought to be either infinite or possess a "finite but unbounded" geometry.
To understand this, we can consider the analogy of the surface of a sphere. On a two-dimensional surface like the Earth, you can travel in any direction and eventually return to your starting point. Similarly, in a universe with a finite but unbounded geometry, if you were to travel in a straight line, you would eventually return to your starting position from the opposite direction.
It's important to note that our observable universe—the part of the universe we can see—is limited by the distance light has had time to travel since the Big Bang, which is approximately 13.8 billion years. Beyond that observable limit, there could be much more universe that we cannot see.
So, as far as we currently understand, there is no well-defined edge to the universe. Our understanding of the universe's structure and size is continually evolving as scientists gather more data and refine cosmological models.