Two birth charts, side by side. Explore their patterns and the stories astrology attaches to them.
For interest, not clinical use. Astrology is not evidence-based and says nothing about whether a relationship will work. This is entertainment, not a compatibility verdict, diagnosis, or relationship guidance. Nothing here goes into a client record.
Nothing is recorded and nothing is stored — everything happens in this browser and is gone when you reload.
Signs are 30° divisions of the tropical zodiac, not astronomical constellations. Positions are shown to 0.1°; this is display precision, not certainty about a birth time.
Major aspects use a fixed 6° orb: the distance from an exact angle. This threshold is an astrology convention. With unknown times, only aspects within that orb throughout both estimated daily ranges appear.
Symbolic associations from Western astrology, written for curiosity. These descriptions do not establish anyone’s traits or a couple’s compatibility.
Sun, Moon and planetary longitudes use the locally bundled Astronomy Engine ephemeris. The rising sign uses the eastern intersection of the horizon and ecliptic. This version does not calculate houses.
Unknown birth times use the entire local calendar day, including daylight-saving changes. Positions are sampled every 30 minutes with a 0.02° outward allowance; their displayed ranges are estimates. No rising sign is calculated. A range crossing a sign boundary shows both ends rather than assigning a single sign.
Dates from 1900 onward are supported. City centers approximate birth locations. Time zones use this browser’s IANA rules; historical rules can be incomplete. A repeated local time needs an explicit first/second occurrence. Nonexistent times are rejected. Manual coordinates and an IANA time zone are available for places outside the city list.
Calculation: Astronomy Engine 2.1.19 (MIT). Offline places: GeoNames, 6,576 cities, reduced from cities15000 and administrative names, downloaded September 6, 2026; CC BY 4.0. No external service receives the entered details.
PracticeDocket Lab · An experiment in interest and tradition.