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Date, time and place. The time matters more than it seems: every four minutes, the Ascendant shifts a whole degree. And if you don't know it, we know what to do too.
Birth-chart atelier · real astronomy
The sky never repeats.
Neither do you.
COSMOATELIER reconstructs the sky of the exact minute you were born — planet by planet, degree by degree, with the same astronomy observatories use — and turns it into a map made to be read slowly.
Free, in two minutes.
The method, in three movements
A small ritual for an enormous map.
We rebuild the firmament
We compute where every body of the solar system stood in that minute, to the arcminute — the same a planetarium would do, but dressed for Sunday.
We hand it to you
The wheel, your three keys —Sun, Moon, Ascendant—, the twelve houses and the aspects. On screen to read, and in a file that's yours forever.
What you'll receive
A complete chart, not a headline.
- ☉Thirteen celestial bodiesFrom the Sun to Pluto, plus Chiron, North Node and Lilith, with sign, degree, house and retrograde status.
- ↗Ascendant, Descendant, Imum Coeli and MidheavenThe four angles that orient the whole chart, computed to the arcminute.
- ⌂The twelve Placidus housesThe most widely used house system in Western astrology, solved by semi-arcs.
- △Major aspectsConjunctions, trines, squares, sextiles and oppositions, ordered by exactness.
- ◑Element and modality balanceFire, earth, air and water; cardinal, fixed and mutable: the texture of your temperament.
- ✶Your wheel, foreverDownload the wheel as SVG and the full report as text. They're yours.
an example of how your birth chart will look
There is a sky that existed only once — the one of your first instant of life. Your birth chart keeps it intact, planet by planet.
Atelier notebook
Why you can trust it
Real astronomy, astrology done right.
No approximate tables: we use an ephemeris engine based on the VSOP87 planetary theories, the same kind of computation planetariums rely on.
±1′ of arc
Accuracy of planetary positions against the Swiss Ephemeris, the professional reference.
1800 – 2099
Supported date range, with time conversion that honours your zone's historical daylight saving.
100% private
All computation happens in your browser. Your birth data is never sent to or stored on any server.
The sky is waiting