Play Gravity Simulator

• PC and Mac
• Chromebook
• Free Web Version
• Free vs Full
• Version Logs
• Report Bugs
• Credits

Physics Lessons

• Physics Tools
• Precession of Mercury
• Negative Mass Mystery

Using the Sim

• Instructions
• Object Types
• Units
• Zooming
• Collision Settings

Sharing Creations

• How to Share
• Save Codes
• Time t=0?

Advanced Tips

• Easy Circular Orbits
• Make an Asteroid Belt
• Track Objects
• Gif Tool
• Quality
• Reduce Lag
• Custom Force Laws
• General Relativity
• Black Holes
• Edit Multiple Objects
• Modding

How the Sim Works

• Force Calculations
• Timestep
• Barnes-Hut Method
• Euler Method
• RK4 Method
• When Distance = 0
• Threading
• Drawing Methods