Space simulation refers to the use of computer models and virtual environments to replicate conditions found in outer space. This technology allows scientists and engineers to study various aspects of space exploration, such as spacecraft design, astronaut training, and mission planning, without the need for actual space travel. These simulations can include realistic representations of celestial bodies, gravitational forces, and atmospheric conditions. By using space simulation, researchers can test theories, predict outcomes, and prepare for challenges that may arise during missions to places like Mars or the Moon.