The concept of the observable universe refers to the portion of the universe that we can currently observe from Earth, taking into account the limitations imposed by the finite speed of light and the age of the universe. It is important to note that our observable universe is not static and expands over time as light from more distant objects reaches us.
Based on our current understanding of cosmology, it is widely believed that the universe is much larger than the portion we can observe. The observable universe is estimated to have a radius of about 46.5 billion light-years, which means that the most distant objects we can currently see are about 46.5 billion light-years away from us.
Beyond the observable universe, there may be a vast expanse of space and structures that we cannot currently detect. Future observations and technological advancements may allow us to probe deeper into the universe and potentially observe more distant objects. However, it is important to understand that the expansion of the universe and the finite speed of light impose limitations on what we can observe.
It is not accurate to say that future observations will simply reveal more space with no galaxies in them, similar to how our current observations appear. Our current observations show galaxies because the light from those galaxies has had enough time to reach us. As we explore deeper into the universe, we may encounter regions that were previously unobservable and potentially discover new galaxies and structures.
It's important to keep in mind that our understanding of the universe is continually evolving as we gather more data and refine our models. The exploration of the universe and its boundaries is an ongoing endeavor in cosmology, and future observations and discoveries will contribute to our understanding of what lies beyond our current observable universe.