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Contemporary astrology · EN + ES

Your birth chart, calculated with the precision of a space mission.

Astrian calculates your chart using the same ephemeris NASA uses to navigate probes to Jupiter. Then it explains it like a good essay: nuanced, no predictions, no mysticism.

Astrian Profiles

Profiles

Documented natal charts of notable figures. No predictions.

Lionel MessiFeaturedB

sports · Pluto scorpio

Lionel Messi

1987 · Rosario, Argentina

Sun

Cancer 2°

Moon

Gemini 16°

ASC

Sagittarius 8°

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Taylor SwiftX

musicians · Pluto scorpio

Taylor Swift

1989 · West Reading, United States

Sun

Sagittarius 21°

Moon

Cancer 5°

ASC

Pisces 15°

Read profile →

Calculations based on NASA JPL DE441 ephemerides · sub-arcsecond precision.

What Astrian offers

Personal charts

Content & reference

Editorial library

Essays on signs, planets, and concepts. Written as reflection, not prediction.

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74-term glossary

Every astrological concept defined with astronomical precision and symbolic context.

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Live data & calendars

Real-time sky

Current planetary positions, moon phases, active retrogrades, and upcoming eclipses.

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Astro calendars

Lunar phases, retrograde periods, and eclipses for the full year.

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Astrian app

Your chart, the sky today, and the full library — in your pocket. Coming soon.

Coming soon

Magazine

What to read now

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Also on Astrian Light

Plan the perfect light.

Golden hour, blue hour, moonrise, and Milky Way visibility for any location. Built on NASA JPL DE441 ephemeris data.

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Glossary

74 terms
Ascendant

The zodiac degree rising on the eastern horizon at the exact moment and location of birth. It changes approximately every two hours, which is why birth time matters. In astrology, it symbolizes the first impression one gives, the body, and the lens through which life is approached.

Retrograde

An apparent backward motion of a planet as seen from Earth — an optical effect caused by the relative speeds of Earth and the planet in their orbits. Astronomically, no planet actually moves backward. In the astrological tradition, retrograde periods are associated with review, revision, and internalization of the planet's themes.

Transit

The current position of a planet in the sky as it moves through the zodiac. When a transiting planet forms an aspect to a point in the natal chart, the tradition interprets this as a period of activation for the themes of that natal point.

Natal chart

A map of the sky at the exact moment and place of birth, showing the positions of the Sun, Moon, planets, and mathematical points relative to the horizon and the zodiac. The foundation of most Western astrological practice.

Conjunction

An aspect formed when two planets occupy the same or very close degrees of the zodiac (typically within 8°). In astrology, a conjunction symbolizes fusion, intensification, and a blending of the energies of both planets — for better or worse.

Domicile

A planet is in domicile when it occupies the sign it rules (e.g., Mars in Aries, Venus in Taurus). In the tradition, this suggests the planet operates with ease and full access to its symbolic resources.

How the calculations work

Built on NASA JPL DE441 — the ephemeris used for interplanetary navigation.

80,221
and counting
charts validated against NASA JPL Horizons
802,210
and counting
planetary positions verified
0
sign errors across all validations

Solar positions accurate to 0.12 arcseconds RMS. Zero sign errors across all validations.

Read about the methodology →

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