A real 3D orrery of the whole solar system with true orbital mechanics — Kepler's equation is solved every frame, so Mercury visibly speeds up at perihelion and retrograde Halley's comet dives inside Venus' orbit before swinging out past Neptune. Drag to fly the camera, scroll to zoom, click any planet (or use the chips) to focus and read its full fact card, then flip to TRUE-scale mode to see how hopelessly tiny the worlds really are.
Each planet follows its real orbit: the radius is r = a(1−e²)/(1+e·cos ν), and ν comes from solving Kepler's equation M = E − e·sin E by Newton's method at every frame, so orbital speed is genuinely faster at perihelion. Distances, periods, eccentricities, inclinations, node and perihelion arguments are the real J2000 values; only the planet pixels are exaggerated (real sizes are sub-pixel — flip Sizes to TRUE to prove it). Halley's comet uses the real orbit: a = 17.8 au, e = 0.967, i = 162° retrograde, perihelion 0.59 au inside Venus' orbit, aphelion 35 au beyond Neptune, period 75.3 years. The asteroid belt spans 2.2–3.2 au and the Kuiper belt 30–48 au (points, not to scale). Moons shown with real distances and periods: the Moon (27.3 d), Io (1.77 d), Europa (3.55 d), Ganymede (7.15 d), Callisto (16.7 d) and Titan (15.9 d). Saturn's rings are drawn as a tilted 3D ring plane split into far/near halves so they wrap correctly in front and behind the globe.