Rambam’s nine galgalim

Explore the nine principal Earth-centred spheres described in Rambam’s Hilchos Yesodei HaTorah, chapter 3. Inspect nested layers in a cutaway globe, sky dome and observer view; compare their shared daily rotation with each body’s own motion, and adjust layer visibility, opacity and cameras. This is a historical, conceptual visualization, not a modern physical model or a reconstruction of every subsidiary sphere.

Opening public animation…