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N-Body Gravity Simulator — Real Orbital Mechanics Sandbox
Set up custom bodies with real mass and velocity vectors and watch actual N-body gravitational simulation play out — binary star systems, three-body choreographies (including the famous stable figure-eight orbit), and gravitational slingshot trajectories, computed from Newtonian gravity rather than scripted animation.
How to use N-Body Gravity Orbit Sandbox
- Add bodies with mass, position and initial velocity.
- Run the simulation and watch the gravitational interaction unfold.
- Try a preset — binary star, figure-eight orbit, slingshot.
- Adjust starting conditions to see how sensitive the outcome is.
Frequently asked questions
- Is this real physics or a scripted animation?
- Real physics — each body's motion is computed from Newtonian gravitational attraction to every other body, numerically integrated step by step, not pre-scripted.
- What is the figure-eight orbit?
- A famous stable three-body solution, discovered numerically in the 1990s, where three equal masses chase each other around a figure-eight path indefinitely — a striking counterexample to the general three-body problem's reputation for chaos.
- Why is the three-body problem considered hard?
- Unlike two bodies, which have an exact closed-form solution, three or more mutually gravitating bodies generally have no such solution — the figure-eight and other choreographies are special stable exceptions found within an otherwise chaotic system.
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