AstraIA · Astrology with astronomical precision
Discover your Birth Chart
Enter your date, time and city of birth. AstraIA calculates the exact sky of that moment with Swiss Ephemeris, inside your own browser, and turns it into a clear interpretation. Then you can talk to the assistant about your chart and today's transits.
- Planets and points: Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, lunar Nodes, Chiron and Lilith.
- Houses and angles: Placidus system (Whole Sign at extreme latitudes), Ascendant, Midheaven, Descendant and Imum Coeli.
- Aspects: conjunction, sextile, square, trine and opposition with their orbs.
- Forecasts: what the stars say today, the coming months with exact dates and a downloadable calendar, planetary returns, solar return, progressions, lunations and eclipses.
- Synastry and composite chart: compare your chart with another person's, with a double wheel and cross aspects.
- Privacy: your date, time and city never leave your device. The assistant only receives positions that have already been calculated.
Your birth data
Charts saved on this device
Your natal map
Your birth chart
— sextile / trine — square / opposition - - conjunction · Hover, tap or use the keyboard on each planet to see its position.
Planets and points
| Body | Sign | Degree | House | Motion |
|---|
Degree images
Angles
| Angle | Sign | Degree |
|---|
Houses
| House | Sign | Cusp |
|---|
Aspects
| Body | Aspect | Body | Orb | Phase |
|---|
Press "Explain this" next to any paragraph to ask AstraIA about it. This interpretation is composed locally from an original library of texts: the same chart always produces the same report. It is a symbolic reading for reflection, not a prediction.
Calculating today's transits…
Text composed locally from the day's exact transits to your chart. Writing it with AstraIA is optional and uses one conversation from the daily limit.
Calculating the transits of the coming months…
Transits of Jupiter, Saturn, Uranus, Neptune, Pluto, Chiron, the North Node and Mars to your planets and angles, with their exact dates (including retrograde passes), plus new moons, full moons and eclipses in your houses. The .ics calendar imports into Google Calendar, Apple Calendar or Outlook.
Calculating returns, solar return and progressions…
Compare your chart with another person's: partner, friend, family. Their data never leaves this device either.
Double wheel: the first person inside (houses and planets), the second on the violet ring. The lines are the cross aspects.
Cross aspects
| Person 1 | Aspect | Person 2 | Orb |
|---|
Composite chart
The chart of the relationship as an entity of its own: each planet is the midpoint between the two.
Suggested questions for your chart
How your birth chart is calculated
The birth chart is the photograph of the sky at the exact moment and place of your birth. AstraIA converts your local time to Universal Time using the historical rules of your city's time zone (including daylight-saving changes), calculates the planets' positions with the Swiss Ephemeris and places the houses with the Placidus system. Everything happens in your browser; there are no third-party servers.
The signs follow the tropical zodiac, the one most used in Western astrology. Each planet is described by its sign, degree, house and motion (direct or retrograde), and the aspects between them are measured with configurable orbs. If you do not know the exact time, use 12:00: the planets will be correct, but the Ascendant and the houses will be approximate.
Calculations: Swiss Ephemeris © Astrodienst AG (AGPL licence). Cities: data from GeoNames (CC BY 4.0). The assistant's answers are symbolic reflections and do not replace professional advice.