Attributions
Auspice is built on generous data sources and open-source software. Thank you to everyone who made them.
Place data
City and place data are derived from GeoNames, licensed under Creative Commons Attribution 4.0 (CC BY 4.0).
Astronomical data
Planetary positions are computed with the open-source astronomy-engine library (MIT) and verified against ephemerides from the NASA/JPL Horizons system (public domain).
Typefaces
Fraunces and Inter, used under the SIL Open Font License 1.1.
Open-source software
- Next.js + ReactMIT
- Tailwind CSSMIT
- Supabase client librariesMIT
- astronomy-engineMIT
- lunar-typescriptMIT
- iztroMIT
- @photostructure/tz-lookupCC0-1.0
- LuxonMIT
- ZodMIT
- next-intlMIT
- SerwistMIT
- esbuild (build-time)MIT
- react-markdownMIT
- pure-randMIT
- Stripe SDKMIT
- Anthropic SDKMIT
- web-pushMPL-2.0
Every dependency is MIT, Apache-2.0, BSD, ISC, CC0, or MPL-2.0 — no copyleft that would restrict use. Chinese calendar and star data come from the lunar-typescript / iztro family only; we never mix calendar engines.