According to our current understanding of the universe, there is no specific edge or center to the observable universe. The observable universe refers to the portion of the universe that we can see from our vantage point on Earth, given the limitations imposed by the speed of light and the age of the universe.
The observable universe is believed to have a radius of approximately 46.5 billion light-years, which means that we can see light from objects that are up to 46.5 billion light-years away from us. However, it's important to note that the universe itself is likely much larger than the observable universe.
The concept of an edge or boundary is somewhat challenging to grasp because the universe is thought to be infinite or at least significantly larger than what we can observe. So, there isn't a physical barrier or boundary marking the end of the universe.
As for whether we can ever reach the edge of the observable universe, it's unlikely due to the expansion of space. The universe is expanding, and galaxies are moving away from each other, driven by a property called cosmic inflation. The rate of expansion is such that objects that are currently beyond our observable universe will continue to move away from us at speeds greater than the speed of light, making it impossible for us to reach them.
As for what lies beyond the observable universe, our current knowledge is limited. Since we cannot directly observe beyond our observable universe, we can only speculate about its nature. It's possible that there are more galaxies, structures, and even other universes beyond what we can see. However, without direct observational evidence, these ideas remain speculative and fall into the realm of theoretical physics and cosmology.