Gravity Cylinders

About

Three long, parallel cylinders of mass slide along their axes. Switch between Newtonian gravity, special-relativistic kinematics and weak-field general relativity, and see how the forces between them change.

View everything from the lab or ride along with any cylinder. Ring markers slide with each cylinder so you can see length contraction and the relativity of simultaneity at work.

• Three physics models you can switch between
• Lab frame or any cylinder's rest frame
• Per-cylinder mass, length, radius, position and speed
• A built-in check that rebuilds the metric directly in the chosen frame

Controls

Version history

1. v1.0.0Oct 17, 2026Gravity Cylinders: Newtonian, SR and weak-field GR forces between moving cylinders

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