Space Simulator Online

Space Simulator Online is a free, browser-based 3D space and astronomy simulator built with WebGL2 and WebGPU. Explore the Sun, planets, moons, dwarf planets, asteroids, and 17 real NASA spacecraft trajectories from JPL Horizons (1800–2100), search real NASA TESS light curves for exoplanets in the Planet Hunter lab, listen to LIGO gravitational-wave chirps, and simulate 3D galaxy collisions. Available in 10 languages with no install or signup required.