Urania exposes every calculation — intermediates, assumptions, and doctrinal provenance — so you can verify the work, not just trust the result.
Swiss Ephemeris wrappers that return a number with no explanation of the assumptions, precision model, or intermediate calculations that produced it.
No way to know which tradition, which source text, or which interpretation a result draws from. The doctrinal choices are invisible to the practitioner.
Interfaces built for horoscope readers, not practitioners who need to inspect, compare, and verify. The tooling doesn't match the seriousness of the craft.
Built on NASA's planetary kernel data, not Swiss Ephemeris. Sub-arcsecond precision for positions going back millennia — the same precision standard used in professional astronomical research.
Intermediates, assumptions, and provenance are surfaced, not hidden. You can trace any result back to the raw calculation and verify each transformation in the chain.
Results are linked to their source tradition. Know whether a lot is computed per Paulus, Porphyry, or a modern adaptation — and why the result differs between them.
Placidus, Whole Sign, Equal, Porphyry, Campanus, Regiomontanus, Koch, Morinus, and more — each with full intermediate calculations shown, not just the final cusps.
Complete lot catalog with per-lot formula provenance, day/night variants, and doctrinal source attribution. Know exactly which text each formula comes from.
Sub-arcsecond planetary positions using NASA's highest-precision kernel, covering 14,000 years. Not a Swiss Ephemeris wrapper — built directly on the source data.
Full precession-nutation model, frame bias, and Earth orientation parameters for research-grade accuracy. Every correction term is documented and traceable.
Primary directions (Ptolemaic, Placidean, Regiomontanan), secondary progressions, solar and lunar returns, and profections — with intermediate values exposed throughout.
Fixed star positions linked to ESA's Gaia Data Release 3 catalog, with proper motion applied. Over a billion sources — the most precise star positions available.
Practitioners who need to verify calculations before presenting them to clients or publishing research. Urania gives you the audit trail your credibility requires.
Scholars studying astrological tradition who need doctrinal traceability and source attribution for their work. Every formula links to its origin text.
Dedicated students who want to understand the astronomy and mathematics behind their charts — not just consume results, but trace the reasoning to its source.
Urania is being built by someone who has spent years wanting a tool like this — one that shows the work, traces the doctrine, and treats serious astrology as the scholarly craft it is. If that's what you've been looking for, we'd like to have you in the founding cohort.
No spam. No horoscopes. Just updates on the build.