The Galaxy Formation Sandbox

Place stars and gas clouds, nudge them into orbit, and watch tiny galaxies swirl, collide, and merge

Tools

Presets

Physics

Stats

Bodies: 0 Stars: 0 Gas: 0 Black Holes: 0 Merges: 0 FPS: 0

How to Play

  • Click to place a star, gas cloud, or black hole
  • Click + drag to fling a body with initial velocity (shown as arrow)
  • Nudge tool: click near a body and drag to push it
  • Bodies attract via gravity — close passes merge into larger bodies
  • Gas clouds are light and numerous; stars are heavy; black holes are massive
  • Watch glow trails and lens effects as galaxies form and collide
  • Use presets for interesting starting configurations