ELI5: Explain Like I'm 5

Bolshoi cosmological simulation

Bolshoi cosmological simulation is a computer simulation that scientists use to model the way our Universe is put together. Using computers and powerful mathematical equations, scientists try to create a model of the Universe that matches reality as closely as possible. This allows them to study how stars, galaxies, and other large structures form and evolve over time, and to answer questions about the structure and makeup of the Universe.