Gravity Sandbox
Real Newtonian N-body · symplectic velocity-Verlet
Speed (dt)
0.15
Gravity G
1.00
New mass
20
▶ Play
⏭ Step
☉ Sun seed
Trails
Clear
Reset
Presets
2-body orbit
Binary + planet
Solar system
Figure-8 (3-body)
Click-drag
on empty space to launch a body — the drag vector sets its velocity. Bodies merge on collision (momentum conserved).
Space
play/pause ·
.
step.
Bodies
0
Steps
0
Kinetic
0
Potential
0
Total E
0
Momentum
0
Paused — press
Space
to run