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live sandbox

field / 2D N-body Newtonian gravity with softening

center0.0 / 0.0

zoom1.00x

drag to launch · wheel to zoom

control room

Shape the system.

01

Choose a starting orbit

02

Turn the time dial

1.0 s/s

paused1 ly / sec

simulated time00:00:00

03

Change the rules

collision behavior

orbit trails

bodies0

energystable

Quick start

A tabletop for gravity.

Every dot is a mass pulling on every other mass. Nudge one thing and the whole system responds. Start slow, then turn the dial up.

01 Pick a systemQuiet orbit, three-body chaos, dust cloud, or a black hole.

02 Launch a bodyDrag on empty space to fling one. Shift for heavy, Alt for a black hole.

03 Grab and deleteDrag a body to move it. Right-click to remove it.

CameraWheel to zoom. Hold space or the hand button to pan. + recenters.