Cosmic void

A cosmic void is a large, relatively empty region in the universe, containing very few galaxies, stars, or matter compared to surrounding areas. These vast spaces, often spanning hundreds of millions of light-years, are part of the large-scale structure of the universe, which resembles a cosmic web of galaxy clusters and filaments separated by these voids. Voids form naturally due to gravitational forces over cosmic time, as matter clusters together in certain regions while leaving others surprisingly empty. They help scientists understand the universe’s composition, evolution, and the influence of dark matter and dark energy.