Milky Way

Ever wondered what would happen if Jupiter slammed into the Sun? Or what our galaxy will look like when it crashes into Andromeda? Milky Way is the cosmic sandbox where you stop wondering and start playing. Smash planets, merge galaxies, build solar systems, and pick up real science along the way. If you like Solar Smash, Universe Sandbox, Spaceflight Simulator, or Solar System Sim, this is your next favorite app. No lectures. No textbooks. Just gravity, collisions, and "what if?" experiments you run with your fingers. GRAVITY SANDBOX Drop in planets, stars, and black holes. Real Newton's-law gravity takes over. Build stable orbits, send moons flying, or kick off total chaos. Every planet in the Solar System is here — Earth, Mars, Jupiter, Saturn, even Pluto. GALAXY MERGER Crash the Milky Way into Andromeda. Watch supermassive black holes fling stars across space. This is the same kind of simulation astronomers use to model what will actually happen to our galaxy in 4 billion years. PROTOPLANETS (3D) See how planets are born. Run a protoplanetary disk simulation and watch dust clumps grow into rocky worlds and gas giants — millions of years compressed into seconds. SPH SIMULATION (PREVIEW) Smoothed Particle Hydrodynamics, the technique real astrophysicists use. Try the Three-Body Problem. Trigger Tidal Disruption when a star wanders too close to a black hole. Watch math turn into a fireworks show. PLANET RIVALS A fast game mode where you compete with other planets to grow into the biggest world in the Solar System. STELLAR COLLISIONS Smash stars together. Trigger a supernova. Form a neutron star or a black hole. All the violent cosmic events you'll never see with a telescope, now in your hands. MECHAZILLA CATCH A SpaceX-inspired mini-game. Fire the Raptor engines on the Super Heavy booster and help Mechazilla make the chopstick catch. SOLAR SYSTEM COMPARISON Put Earth next to Jupiter. Compare the Sun to Betelgeuse. Get a real feel for how big the universe actually is. WHY PEOPLE LOVE IT - Real physics that doesn't feel like homework - Real astronomy: galaxy formation, planet formation, stellar evolution, black holes, and more - Endless replay — every simulation runs differently - Loved by space fans, students, teachers, and curious kids 9 and up Rated 4.8 stars by 1,300+ space fans. NOW FREE TO PLAY Milky Way just went freemium. Download free. PRIVACY FIRST We collect zero data. Nothing leaves your device. No tracking, no accounts, no ads following you around the internet. Whether you're a high schooler curious about physics, a stargazer who wants more than a star map, a teacher hunting for a classroom tool, or just someone who's always wondered what would happen if two galaxies collided — Milky Way is built for you. Download now. Bend gravity. Build worlds. Learn the cosmos.