Orrery
An astrology processor
The sky, exactly as it stood the moment you arrived.
Orrery computes exact planetary positions and draws the natal chart, then keeps every chart in your library. Draw one now — no account needed.
Sample chart · the September 2026 equinox, 00:05 UTC over Kyiv
Tropical zodiac · Placidus houses
- Swiss Ephemeris
- Tropical · Placidus
- Place search never leaves the server
- Draws without an account
The instrument
A professional instrument, not a horoscope app.
Every technique carries its tables and formulas underneath — so you can check the work instead of trusting a picture of a wheel.
Transits, secondary progressions, solar and lunar returns, and directions at your choice of key — symbolic, solar arc or Naibod — each drawn against the natal chart, with its own house ring and exact dates.
- Transit
- Progression
- Solar return
- Directions
- Direction formulas
- Interpretation
What an account adds
Drawing a chart needs no account. Signing up turns the charts you draw into a library of your own, and opens the parts of the instrument that read a chart rather than just draw it.
Email and password, or Google. Verify the address and you are in.
- A library of your own — save a chart, name it, and pick it up where you left off.
- The interpretation panels: what every placement, house and aspect traditionally means.
- Readings written for your chart, drafted as consultation notes rather than a verdict.
What Orrery is
A web application for astrology, built on a real ephemeris.
- You give it a date, time and place of birth.
- It computes where the Sun, Moon and planets stood at that moment, using the Swiss Ephemeris.
- It draws them as a natal chart, and sets out what the placements traditionally mean.
With an account it also keeps your charts, compares two of them, follows the current sky against your own, and can have a reading written for you.
Astrological interpretation is offered for reflection and interest. It is not a factual claim about anyone, and it is not medical, psychological, legal or financial advice.
What it does not do
- No ads, no tracking pixels, no third-party analytics
- No profiling, and no cookie banner to dismiss
- Never sold, rented or shared
- No external geocoder — the gazetteer is a local copy
- Nothing stored at all until you sign in