Relativity PlaygroundGitHub

An interactive relativity playground

Play with spacetime.

Choose a simulation, change the conditions, and see how space, time, light, and motion respond.

Mission select3 missions available
01GeometryOnline

Spacetime Curvature

See how mass changes the shape of space.

Launch 02Extreme gravityOnline

Black Holes

Approach the event horizon and the limit of escape.

Launch 03LightOnline

Gravitational Lensing

Watch massive objects bend light into arcs and rings.

Launch
04TimeIn development

Time Dilation

Compare how clocks move near mass and far away.

05MotionIn development

Geodesics

Follow natural paths through curved spacetime.

06WavesIn development

Gravitational Waves

Visualize ripples moving through spacetime.