# Quizzman Astro

**Product:** [astro.quizzman.com](https://astro.quizzman.com)  
**Stack:** Rust `astro-serve` · VSOP87D · ELP/MPP02 · DE440 · Sky Viewer  

Quizzman Astro is the astronomy engine behind Quizzman’s calendrics and planetarium tools: day-sky almanac, zodiac support, and an interactive **Sky Viewer**.

## Quick links

| Surface | URL |
| --- | --- |
| Sky Viewer | [/sky-viewer](/sky-viewer) |
| **About (Markdown for AI)** | [/about.md](/about.md) · [Sky Viewer](/about-sky-viewer.md) · [Engine](/about-engine.md) · [API](/about-api.md) |
| **llms.txt** | [/llms.txt](/llms.txt) · [/llms-full.txt](/llms-full.txt) |
| **Glossary** (VI / EN / 繁中) | [/glossary](/glossary) · [/glossary-en](/glossary-en) · [/glossary-zht](/glossary-zht) |
| Audit paper | [/paper](/paper) |
| Health | [/health](/health) |
| This docs portal | [/guide/README.md](/guide/README.md) |

## What you can do

1. **Observe the sky** — 2D stereographic map + 3D celestial sphere with stars, planets, Moon, Sun, DSO, ISS.
2. **Explorer** — any-body-centric solar system (Earth, Sun, Moon, planets as frame origin).
3. **Call APIs** — `/viewer/sky`, `/astro/day-sky`, `/v1/zodiac-support/*`.

## Start here

- [**About Quizzman Astro**](/about.md) — full product definition for humans & AI agents  
- [**Glossary**](/glossary) ([EN](/glossary-en) · [繁中](/glossary-zht)) — coordinates, angles, 88 IAU constellations  
- [Sky Viewer](/guide/SKY_VIEWER.md) — UI, shortcuts, layers  
- [API Overview](/guide/API_OVERVIEW.md) — endpoints at a glance  
- [Explorer Mode](/guide/EXPLORER.md) — Observation Center  


## Design of this docs UI

This portal uses the **QMF Markdown Viewer** shell (`md-viewer`) — the same reading surface as [ui.quizzman.com/qmf](https://ui.quizzman.com/qmf/view.html?src=/qmf/docs/v4/CLI_SPEC.md): left document nav, article card, right “On this page” TOC, ⌘K search.