The expansion of the universe is a perplexing phenomenon that raises fundamental questions about the nature of space and time. Contrary to common misconception, the universe is not expanding into an existing void but rather creating more space as it expands. The expansion is driven by an unknown force known as dark energy, which permeates the entire universe and causes the distance between objects to increase over time. This expansion is not uniform, however, with distant galaxies receding from us at an accelerated rate, leading to the formation of cosmic voids and filaments. As the universe continues to expand, these voids will grow larger, eventually leading to a state known as the "Big Freeze," where the universe will reach a point of maximum coldness and darkness.
