Cygnus
Reinventing the Wheel
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What it is
Cast a chart.
Read the sky. Find the moment.
Cygnus is an astrology workbench. Five chart types, five timing techniques, four reference tools, and the Sky Finder — a boolean electional engine that combines forty-five traditional conditions with AND, OR, and NOT, and counts the matching windows as you build the query.
The whole app runs on a custom Rust ephemeris written for this project, accurate to within an arc-second of Swiss Ephemeris across modern dates.
Try it
The next seven days, filtered for a fast waxing Moon that isn't void of course.
Three primitive conditions, one click. The full Sky Finder expresses forty-five.
The workshop
Fifteen tools, one ephemeris.
Every chart, every timing technique, every reference. Free, with or without an account.
Sky Finder
Build a query tree from forty-five traditional conditions. The window count updates as you type; results render against a live wheel and a brushable timeline.
Birth Chart
Cast a natal chart from a date, time, and place. Choose from ten house systems; switch glyph sets and rings at will.
Solar Return
Bisects the exact moment the Sun returns to its natal longitude in a given year, then casts the chart at that instant. Optional relocation.
Lunar Return
Finds the Moon's next return to its natal longitude after a target date and casts the chart at that moment. Optional relocation.
Secondary Progressions
Day-for-a-year progressed chart for any age. Shows the progressed wheel beside the natal one.
Solar Arc Directions
Applies the progressed Sun's arc to every natal placement, producing a directed chart at the chosen date.
Transits
The sky right now over any location, with a scrubber that steps minute by minute or month by month. Lock the Ascendant to watch the planets sweep through.
Zodiacal Releasing
Hellenistic time-lord periods from the Lot of Spirit or Fortune, recursive to L3, L4, or L5. The current period highlights itself.
Firdaria
The Persian seventy-five-year cycle of major and minor period rulerships, sect-determined, with an Abu Mashar option for the nodes.
Annual Profections
Year, month, and day profections from the natal Ascendant, with the current age highlighted across all three tables.
Transit Timeline
Every transit-to-natal aspect crossing across a date range, grouped by day. Default filter is the outer planets, where one-day precision is honest.
Moon Calendar
Phase events, sign ingresses, and Void of Course intervals merged into a single chronological list. The current Moon state sits at the top.
Planetary Hours
The full twenty-four-hour table for any date and location, day and night hours separated. The current hour highlights and auto-scrolls into view.
Void of Course Moon
Every Void of Course interval across a date range. Built on the same engine that powers the Sky Finder.
Dignity Tables
The five essential dignities for the seven traditional planets, with switchable bound and decan schemes and a longitude lookup at any degree.
The arrangement
What you can count on.
Ownership
Independent.
One developer. No VC, no acquisition runway, no roadmap pressure beyond what users ask for.
Pricing
Free during early access.
Every tool above is free right now. A paid tier arrives later this year with plenty of notice; the free tier will stay useful on its own.
Model
No ads. Ever.
No banners, no sponsored content, no affiliate placements. The business model is incompatible with the product.
Data
Your data isn't for sale.
Cygnus does not sell, share, or syndicate charts, birth data, or behavior. No data brokers, no ad networks, no AI training corpora.
Privacy
Privacy by default.
Analytics are self-hosted and cookieless. Birth coordinates, share URLs, and search-tree contents never reach the wire. Export or delete your account at any time.
Process
Built in public.
Releases are documented and decisions are visible. The feedback link in the footer reaches the developer directly.