Particle / N-Body Simulator
Simulate gravity, orbital mechanics, and impulse-based collisions in real time. Switch between an orbital system and a colliding gas, and watch kinetic energy evolve.
Particle / N-Body StudioLive
symplectic Euler · impulse collisions
Controls
Presets
Data Inspector
Bodies0
Kinetic energy0.00e+0
Mean speed0.0
Max speed0.0
Governing equation
Reading this result: Moderate mutual gravity (G=60) lets the 120 bodies form loose orbiting structures instead of collapsing outright.
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
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How it works
This engine integrates Newtonian mechanics with a semi-implicit (symplectic) Euler scheme and resolves circle–circle collisions with impulse-based response and positional correction. Pairwise gravity uses softening to avoid singularities, so orbits stay stable over long runs.
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Frequently asked questions
Is this particle simulation tool really free?▾
Yes. Particle / N-Body Simulator runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?▾
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
Can I save or share my simulation?▾
Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.
How accurate are the results?▾
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.