# kepler's second law  — made visible

an interactive orbit ·  [tools & art](/art-tools.html)

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kepler's second law · booting

drag the eccentricity slider: the orbit stretches, and the planet starts to  **hurry past perihelion ** (P, its closest point) and loiter around aphelion (A, farthest). that uneven pace is kepler's second law — the line from sun to planet sweeps  **equal areas in equal times **, so the planet cannot keep a steady speed.[1] the amber triangle is this minute's sweep; its area stays flat while the planet's speed does not.[1] click anywhere on the canvas to drop the planet at that angle — the law holds wherever you start measuring.

## Sources

[1]  [Orbits and Kepler's Laws — NASA Science](https://science.nasa.gov/solar-system/orbits-and-keplers-laws/)

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Source: <https://ebungo.orem.in/art-kepler-2026-09-12.html>