Newton’s Gravity

Grav-Sim is all about the physics of gravity.

It models a set of bodies (point masses) gravitating under Newton's laws of motion. It makes no assumptions about what those bodies really are:

Planets in the Solar system


Stars in the Pleiades open cluster


Stars in the M13 globular cluster


Star clusters in the Andromeda galaxy


Galaxies in the Virgo galaxy cluster


Black holes in the early universe