Astronomical simulators are computer programs designed to model and visualize celestial phenomena. They allow users to explore the universe by simulating the positions and movements of stars, planets, and other celestial bodies over time. These tools can be used for educational purposes, research, or simply for entertainment. Many astronomical simulators incorporate real data from telescopes and space missions, providing accurate representations of the night sky. Users can adjust parameters such as time, location, and viewing angle to see how the universe changes. Popular examples include Stellarium and Celestia, which help users learn about constellations and planetary motion.