The size of the universe is a subject of ongoing scientific investigation and debate. Currently, the prevailing scientific understanding suggests that the universe is incredibly vast, and its exact size is not yet fully known. However, based on observations and measurements, scientists estimate that the observable universe extends over at least 93 billion light-years in diameter.
When discussing the concept of infinity in relation to the size of the universe, it's important to note that infinity is a mathematical concept that represents an endless or limitless quantity. In mathematics, there are different types of infinities, and they can behave in different ways.
Regarding the universe, there are different cosmological models and theories that propose different possibilities for its size and shape. Some theories suggest that the universe could be infinite in extent, meaning it would have no boundaries or edges. In an infinite universe, there would be no origin or end in the sense that it would extend infinitely in all directions.
Other theories propose that the universe could be finite but unbounded, similar to the surface of a sphere. In this case, while the universe would have a finite size, it would not have an edge or boundary that one could reach. Instead, one could theoretically travel in a straight line and eventually return to the starting point.
It's important to recognize that our understanding of the universe is continually evolving as scientific research progresses. New discoveries and theories may emerge that could provide further insights into the size, structure, and ultimate nature of the universe.