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When to use Equation of Time 3D Explorer

Use this explorer when you want to understand sundials, the analemma, and why solar noon drifts from clock noon; skip it when you want the globe or the Moon.

Classroom demos of the analemma and the equation of time
Explaining why a sundial does not match a clock
Separating the tilt effect from the eccentricity effect

This is an educational visualization using a standard approximation, not drawn to exact scale.

Walk the controls in the step-by-step guide, or compare options in vs alternatives. Open the Equation of Time 3D Explorer.

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Last updated: Jul 17, 2026

Reviewed by the Free Tool Online editorial team · Tested in the current versions of Chrome, Firefox, Safari, and Edge before publishing. No account is needed to use any tool. Report a bug - we triage within 72 hours. · Last refreshed April 2026.

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