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When to use Galilean Moons 3D Explorer
Use the Galilean Moons 3D Explorer when you need a quick browser view of Jupiter's four big moons and the Laplace lock - and skip it when you need ephemerides for every irregular satellite.
- Classroom demos of the Io-Europa-Ganymede 4:2:1 period lock with Callisto as the outsider
- Quick refresher before a telescope night aimed at Jupiter's moons
- Comparing moon sizes (Ganymede larger than Mercury) without leaving the browser
This page does not replace planetarium ephemerides, does not list Jupiter's dozens of smaller moons, and does not solve n-body gravity.
Walk the controls in the step-by-step guide, or compare options in vs alternatives. Open the Galilean Moons 3D Explorer.
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