A professional tool
for serious astrology
ZEUS wasn't built as an introduction to astrology — it's a working environment for the practicing astrologer. Precise calculations, complete methodology, flexible configuration — all in one program.
Astronomical Calculations
Built on the licensed Swiss Ephemeris — the precision standard trusted by professionals worldwide.
Coordinate Systems
- System center: geocentric, topocentric, heliocentric, hybrid
- Projection plane: ecliptic, equator, declination, horizon (astrological or geodetic azimuth), prime vertical, meridian, mundane, oblique ascension
House Systems
- More than 30 astrological house systems
- Unlimited Princeps houses, including from sensitive points
- Thematic (turned) houses
- Geodetic equivalents by Sepharial and Grimm-Friedrich, including reverse calculation
Additional Calculations
- Solar and lunar eclipses with circumstances — in table form, on the chart, and on the astrocartography map
- Planetary orbital parameters
- Tools for analyzing symmetrical patterns
- Up to 5 circles simultaneously (4 main + extra); parallel display of individual charts
- Unlimited independent charts from loaded data
Objects and Zodiac
Complete coverage of celestial bodies — from classical planets to more than 20,000 named asteroids. Flexible zodiac and harmonic selection.
Celestial Objects
- Planets from the Sun through Pluto
- Hamburg School hypothetical planets + Proserpina
- Midpoints
- Fixed stars
- Lots (built-in + user-defined)
- Pars Fortunae by Placidus (with latitude)
- More than 20,000 named asteroids
- Lunations, eclipses, mutations
- Antiscia and contra-antiscia
- Natal arc lots (after W. Lilly)
- Zodiacal divisions and planetary node apsides
Zodiac
- Tropical
- Sidereal (35 ayanamshas)
- Custom — draconic, planetary zodiacs, and any other
Harmonics
- Any harmonic from 1 to 2000, including fractional
Chart Types
More than 30 chart types — from the classic radix to exotic solar return variants and zodiacal divisions. Everything needed in practice, plus the ability to create your own chart types.
Charts
- Radix, transit
- Progressions — direct and converse, 4 cusp calculation algorithms
- Directions — zodiacal, equatorial, primary, planetary arc, fixed arc; direct and converse; cusp calculation from MC; solar and lunar return directions automatically
- Profections (settings analogous to directions)
- Return charts — solar, lunar, mercurial, etc.
- Monthly and diurnal solar return
- Annual horoscope (Sun's ingress to 0° Capricorn)
- Solar and lunar eclipse, preceding syzygy
- Minor lunation
- Mundane and individual Meridian solar return
- Antiscia / contra-antiscia
- Zodiacal divisions: D9, D12, D12M (after Manilius), D13
- Phase lunar
- Composite
- Davison Mean Chart (including spherical algorithm)
- Solar equations chart
- Thematic charts (object on ASC)
- Fixed charts
Analytical Tools
An extensive set of calculation tables — from classical aspects to traditional dignities, chronocrators, and Uranian astrology.
Analytical Tables
- Aspect table, 30-degree dial
- Conjunctions with fixed stars and asteroids
- Declination scale, parans
- Aspect chains and configurations (with interactive chart link)
- Midpoints, aspect chains
- Antiscia, zodiacal divisions (duads, novenaries, dodecatemories)
- House energy links
- Object coordinates with astronomical and astrological parameters
- Synastry matrices (harmonic astrology)
- Planetary pictures, sensitive points, arc resonances — the Uranian toolkit
- Statistics
Traditional Astrology
- Dignities table — essential and accidental
- Almutens and thematic almutens
- Planetary sect
- Lord of the Geniture by Lilly and Ben Ezra
- Hyleg by Schöner
- Temperament
- Planetary hours
- Firdaria by Al-Biruni and Bonatti
- Aphesis, decennials
- Chronocrators by terms and profections
- Bindhu table
Astro-Calculator
- Conversion between coordinate systems
- Oblique ascension/descension, ascensional difference
- Meridian distance, semi-arcs, seasonal hour
- Mundane position (Placidus, Regiomontanus)
- Cazimi determination, zenith distance, pole
- Oblique rising/setting under the object's own pole and the significator's pole
- Regiomontanus house circle table
Predictive Tools and Events
Everything for working with the time axis: transits, progressions, directions, returns, graphs, and an astrological calendar.
Event Calculation
- Event sequence (aspects, ingresses, phase shifts, crossings — particularly useful for horary)
- Transits, progressions, directions, profections
- Occultations
- Symbolic, primary, and Alexandrian directions
- Planetary returns — precession-corrected, progressed return, aspect-of-return selection
- Eclipses, ingresses, and phases
- Phases relative to the Sun, heliacal phases
- Risings, settings, and culminations
- Lunations, lunar days, void-of-course Moon
Graphs and Calendars
- Astrological calendar — Moon phases, void-of-course, stations, aspects, ingresses for each day of the month
- Aspect graphs for any selected period — declination parallels, latitudes, retrograde loops
- Graphic ephemeris
- Dynamic graph of a selected aspect, parallel, or antiscion over time
Astrocartography
A detailed geographic map with a complete toolkit — from aspect lines to cyclocartography with predictive methods.
Tools
- High-resolution geographic map down to house cusps; flexible zoom
- Planet aspect lines to the angular cusps
- Local Space lines, interactive display of any custom line
- Parans — on the map and in table form
- Orb band for aspect lines and parans
- Geodetic grid and Sepharial grid
- Parallel display of natal and relocated chart
- Quick creation/deletion of user-defined locations
- Relocation preserving natal azimuths; interactive relocation
- Distance and azimuth measurement between any two points
- Interactive tooltips, highlighting of selected lines
Cyclocartography
- Simultaneous display of natal lines and lines from any predictive method — progressions, directions, and others
Usability and Workflow
Non-calculation tools that make professional work faster and more comfortable.
Celestial Sphere
3D visualization of calculated data. The Sphere displays objects, stars, coordinate system grids, key points and axes, and the house grid. Flexible display settings. (Windows only for now)
Database
Temporary database — events at your fingertips: quick chart preview,
sorting, loading into circles.
Main database — long-term storage with flexible search,
cut/paste, and analytics block (objects in signs and houses,
Ascendant sign, retrograde status, Moon phase — as percentages over a selection).
Sessions
Saves the complete state of your current work: configuration, events in each circle, chart types, circle activity, aspecting direction, window layout. Open a session and pick up exactly where you left off.
Interpretation Texts
Display interpretations for fixed stars, midpoints, sensitive points, planets in signs and houses, aspects, lunar mansions, nakshatras. Users can create their own texts following the rules in the User Manual.
Interactive Tooltips
Flexible pop-up tooltips for chart elements — showing the astronomical and astrological parameters you've configured, right on the chart, without opening calculation tables.
Updates
The program updates automatically at launch. Windows and macOS (native, Intel and Apple Silicon) — both platforms fully supported.
Try ZEUS free for 14 days
Full access, no feature restrictions.