# SOLARGOD ▸ Orrery A standalone, browser-based 3D solar-system explorer — the interplanetary sibling of [GODSIGH](../GODSIGH), which watches Earth. Float above a compressed-scale ("MEGA") solar system with every world visible at once, moving on **real JPL ephemerides**; scrub a time bar across centuries; fly the camera into orbit around any planet, its moons circling; toggle **TRUE scale** and watch the system animate out into its real, humbling emptiness. Live layers plot where Voyager 1, JWST and Parker Solar Probe are *right now*, plus real asteroids, comets and Earth close-approaches. Everything is client-side, free, and keyless. ![SOLARGOD](docs/hero.jpg) ## Quickstart ```sh python3 serve.py # stdlib only — no npm, no build step # open http://127.0.0.1:8147 ``` `serve.py` statically serves the app and proxies the JPL feeds a browser can't call directly (Horizons / SBDB / CAD — no CORS), with a disk cache in `cache/`. Three.js loads from a pinned CDN importmap. The deterministic core (Sun, planets, moons, orbits, time travel) runs with **zero network calls** — positions are computed locally from Keplerian elements; network layers are additive and fail soft. ## Verify Open **http://127.0.0.1:8147/verify.html** — an in-browser gate runner that checks the ephemeris against **JPL Horizons ground truth** (hard-coded checkpoints + live queries through the proxy). All 13 gates should read PASS, e.g.: | Gate | Result | |------|--------| | Mars / Jupiter / Earth @ 2026-07-15 (heliocentric ecliptic AU) | Δ ≤ 3.3e-4 / 2.9e-3 / 3.9e-5 AU | | Kepler solver converges at e=0.97 · orbitPath closes · frame round-trips | exact | | MEGA→TRUE preserves direction (unit dot ≈ 1) | 1.000000000000 | | Mars @ J2000 · Jupiter @ 1900 vs **live** Horizons | Δ 4.8e-5 / 2.0e-3 AU | | Main belt between Mars & Jupiter · Halley aphelion beyond Neptune | pass | | Voyager 1 @ 2026-07-15 = (−32.07, −136.21, +98.55) AU · JWST hugs Earth | Δ 0.002 / 0.011 AU | ## Layers | Layer | Source | Default | Notes | |-------|--------|:------:|-------| | **Planets & orbits** | JPL SSD approximate elements (Standish) | on | 8 planets + Pluto, textured, MEGA-compressed orbit paths | | **Body labels** | — | on | names; the focused body's children also get distance labels | | **Moons** | JPL satellite data | on | 21 moons, per-parent local compression, retrograde Triton | | **Rings** | true km, scaled to parent | on | Saturn (textured annulus) · Uranus (schematic) | | **Spacecraft** | JPL **Horizons** (proxy) | on | Voyager 1/2, New Horizons, JWST, Parker, Juno, Lucy, Psyche — live distance + one-way light-time | | **Main belt** | JPL **SBDB** (proxy) | off | ~1500 main-belt asteroids, shared Kepler core | | **Comets** | JPL **SBDB** (proxy) | on | 1P/Halley, 2P/Encke, 67P, 96P — full orbits + anti-sunward 1/r² tail | | **Close approaches** | JPL **CAD** (proxy) | off | ±30-day NEO radar around Earth, miss distance in lunar distances | ## Controls - **Focus** — click any body (or use the Focus menu) → the camera flies into orbit around it; breadcrumb `SOL ▸ JUPITER ▸ EUROPA`; `Esc` steps out one level. - **MEGA / TRUE** — toggle the scale mode; the transition animates over ~2.5 s. - **Body scale** — 1× / 100× / 1200× radius exaggeration. - **Time bar** — NOW, play/pause, reverse, rate presets (`1× · 1 min/s … 1 yr/s`), and a scrubbable 1800–2050 timeline. A **LIVE / SCRUBBED** chip mirrors GODSIGH. - **Info panel** — appears on focus: a grimoire card with a physical fact sheet, hand-written prose, a stylized portrait, and **live computed** facts (distance from Sun & Earth, sunlight age, orbital speed, day & year length). Focusing Earth reveals a link to the GODSIGH world view. - **Shareable URLs** — the view serializes to the hash (`#f=&t=