Physics · Intermediate · 3 steps

Kepler's Second Law

Taught by Einstein · Playful thought experiments

Ride along with a planet on a stretched orbit: it races past the Sun and crawls far away, yet sweeps equal areas in equal times. Paint your own wedges, measure them, and see why Kepler's second law holds. Einstein narrates.

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Free, no account needed. Opens right here; the same lesson runs in the app with narration in Einstein's voice.

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What you will learn

  • Kepler's second law: equal areas in equal times
  • Why a planet moves fastest near the Sun
  • How to measure swept areas yourself
  • How orbit shape and speed are linked

Lesson outline

  1. The Law of Equal Areas
  2. Orbital Simulation
  3. Test Your Knowledge

Each step has a short narration, something to drag or toggle, and the lesson ends with a quiz. You can go back to any step.

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