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About
Build a star. Crush it into a black hole. Then feed it. Push mass, spin, metals and pressure and watch the universe react. Make supernovas, pulsars and magnetars, spaghettify planets, shred whole stars and smash two black holes together. 🌑 Form black holes from dying stars 🪐 Feed them gas, planets, stars and probes 💥 Trigger supernovas, jets and tidal disruptions 🌀 Merge black holes and watch spacetime ripple 📖 Discover 85 cosmic states, including secrets science has never seen ⏳ Store remnants in the Deep Time Vault and come back to see what they become Real astrophysics, simplified for play. How big can you make it?