Scale & image credits
Equatorial diameters: NASA planetary fact sheets. Spherical planets; simplified circular, coplanar orbits and illustrative starting positions.
Human-made satellites: four selected missions. Enlarged schematic models; reference altitudes from NASA mission pages linked in each spacecraft panel. Circular model periods are calculated from planetary gravity. No live tracking; orbital orientations and starting positions are illustrative.
Background: a locally generated, illustrative star field and Milky Way-style glow; not an exact star map or photograph.
Moon sizes and orbital data: JPL physical parameters and mean orbital elements. Twenty selected moons, not a complete catalogue. Moons use equivalent-volume spheres and illustrative plain colors; no photographic moon textures. Moon orbital planes and positions are schematic.
Planet maps: Solar System Scope, CC BY 4.0. Based on spacecraft imagery; colors enhanced by the provider. Venus shows its cloud cover. Texture files unchanged. Rendering: Three.js (MIT).