Cosmic Expansion & Structure Simulator

Advanced cosmology studies the evolution and structure of the universe at the largest scales — how the Friedmann equations govern the expanding scale factor, and how gravity turns a nearly smooth early universe into today's cosmic web of galaxy filaments, clusters and voids threading vast empty regions. This simulator integrates the Friedmann equation in real time from your chosen Hubble constant and matter density, driving both a uniform Hubble expansion of a galaxy grid and a Zel'dovich-approximation growth of density perturbations on top of it. Watch how a higher matter density accelerates structure formation while a dark-energy-dominated universe stretches space fast enough to freeze the web in place.