The visible universe, also known as the observable universe, refers to the portion of the universe that we can observe from Earth. It is limited by the distance light has had the opportunity to reach us since the Big Bang, given the finite speed of light.
The observable universe is estimated to have a radius of approximately 46.6 billion light-years. This means that the farthest objects we can currently observe are located about 46.6 billion light-years away from us.
However, it is important to note that the observable universe is just a tiny fraction of the entire universe. The universe is believed to be much larger and potentially infinite in size. The extent of the universe beyond our observable reach is often referred to as the unobservable or the uncharted universe.
The actual size and nature of the entire universe remain unknown and are the subject of ongoing scientific inquiry and debate. Our understanding of the universe is limited by the distance that light has been able to travel since the beginning of the universe, as well as the expansion of space itself.
It is possible that there are regions of the universe beyond our observational reach that could be vastly different from what we currently comprehend. Cosmologists continue to study the universe's large-scale structure and strive to unravel its mysteries, pushing the boundaries of our knowledge and exploration.