Astronomical simulation refers to the use of computer models to replicate and study celestial phenomena and the behavior of astronomical objects. These simulations help scientists understand complex processes such as the formation of galaxies, the dynamics of star systems, and the evolution of the universe over time. By inputting various physical laws and initial conditions, researchers can visualize how these systems evolve. These simulations often utilize data from telescopes and other observational tools to create realistic models. They can also assist in predicting future events, such as the collision of asteroids or the behavior of black holes. Overall, astronomical simulations are essential for advancing our knowledge of the cosmos.