Community-built physics experiments and study materials — run an experiment live and fork it into your own studio, or read a guide someone wrote.
Earth, at its measured mass and its measured radius. One grid cell is a thousand kilometres and one second is ten minutes. The moon is at 12,000 km travelling at 5,765 m/s, which is exactly the speed a circle needs there — nobody chose that number, √(GM/r) did. It also carries an engine: a property wired from nodes that lights for three seconds and pushes along its own velocity. Watch what one small shove does to the far side of the orbit.
The real Earth-Moon system, in real units. One grid cell is 1000 km, one mass unit is 10^22 kg, one second is ten minutes. Nothing is tuned: Earth carries its measured 5.97 x 10^24 kg, the Moon sits 384,400 km away, and the pull is Newton's F = G M m / r squared with G converted into these units. The 27.3-day orbit that comes out is what those numbers produce. Only the globes are drawn larger than life so you can see them; their masses are untouched.
