The astrologer's workbench, with the math shown.
Every chart auditable from first principles to doctrine. No black boxes, no horoscope guesswork — just calculations you can stake your reputation on.
λ_sun = 142.7184° (JPL DE441, ΔT=29.18s)
house_sys = whole_sign
cusp_II = 120.0000° (ASC=98.4° → Leo rising)
doctrine = Valens, Anth. II.16 — "place of livelihood"
verified ✓
Consumer astrology software wasn't built for people who actually practice.
You're delineating a chart for a paying client, or arguing a technical point with a peer, and the software gives you a number. No derivation. No source. No doctrine. Just a glowing wheel and a vibe.
Opaque calculations
Closed engines that won't tell you which ephemeris, which ΔT model, or which house formula they're using — never mind why.
No doctrinal lineage
Interpretations float free of the texts. You can't tell if a delineation comes from Valens, Lilly, Rudhyar, or someone's blog post.
Mystical hand-waving
UI dressed in crystals and tarot, copy that swerves into "energies" the moment something needs to be defended on technical grounds.
Every value in the chart can be opened, derived, and cited.
Click any house cusp, planetary position, aspect, or progression. Urania shows you the math underneath it and the doctrinal source it answers to.
The math layer
Ephemeris kernel, ΔT model, frame of reference, precession and nutation corrections, house formula — all surfaced, all switchable, all logged on the chart.
The doctrine layer
Each technique cites its primary source: Valens, Ptolemy, Abu Ma'shar, Bonatti, Lilly, Morin, Rudhyar. You see the lineage, not just the result.
The audit trace
Every chart carries a reproducible trace — math + doctrine + parameter set — so you can defend, share, or rebuild any reading you've ever issued.
The full workbench.
Unlimited charts & subjects
Build a real client roster. Natal, return, progressed, synastry, composite — no cap, no per-chart pricing.
Multiple house systems
Whole Sign, Placidus, Porphyry, Regiomontanus, Campanus, Equal, Alcabitius, Koch — switch and compare in place.
DE441 + selectable kernels
JPL DE441 by default, with DE440 and DE431 available for long-arc work. ΔT models documented and switchable.
Sessions & library
Workspaces for client sessions, saved interpretive notes, technique presets, and a private library of charts you can revisit.
Export charts & reports
Vector chart wheels, structured PDF reports, and machine-readable JSON of the full audit trace for your records.
Auditable trace, always on
Every reading you issue from Urania can be reproduced byte-for-byte from its trace. Stake your reputation on it.
One tier. The whole workbench.
A free tier covers a handful of charts and standard Whole Sign / Placidus output. Pro is for working practitioners.
or $180/year — two months on the house
- Unlimited charts, subjects, and sessions
- Full audit trace: math + doctrinal citations
- Eight house systems, switchable in place
- DE441, DE440, DE431 ephemeris kernels
- Vector chart, PDF, and JSON export
- Library workspace and technique presets
Cancel anytime. Free tier available — no card required.
Things serious practitioners ask first.
Which house systems are supported?
Whole Sign, Placidus, Porphyry, Regiomontanus, Campanus, Equal (from ASC and from MC), Alcabitius, and Koch. You can switch systems on a live chart and compare cusps side by side. Each system carries a citation to the doctrinal source that defines it.
How does the engine differ from Swiss Ephemeris?
Urania computes positions directly from JPL DE-series kernels (DE441 by default) rather than wrapping a precomputed library. This means you can inspect and switch the kernel, the ΔT model, the frame, and the precession/nutation theory independently — and every chart records which ones it used.
Can I import charts from other software?
Yes. Urania reads AstroDatabank-style records and standard JSON chart exports. On import, it re-derives every value from first principles so the chart enters your library with a fresh, signed audit trace.
What doctrines does the interpretive layer cite?
Hellenistic (Valens, Ptolemy, Dorotheus), Perso-Arabic (Abu Ma'shar, Al-Biruni), Medieval Latin (Bonatti, Morin), Early Modern (Lilly, Gadbury), and select Modern (Rudhyar, Hand). You choose which traditions to draw on; Urania cites them by work, book, and chapter.
Is this for hobbyists?
Honestly, no. Urania is built for people who consult, teach, write, or argue technically about astrology — and who need their work to hold up under scrutiny. If you want a daily horoscope, this isn't the tool.
A chart you can defend, line by line.
Start free. Move to Pro when you want the full kernel set, the unlimited library, and the audit trace turned all the way up.
Open the workbench