Skip to main content

Sealed Letter

Your year ahead, in a letter.

A letter for your year ahead — drafted from your solar return chart. Save your birth details, then return here to receive it.

Your sealed letter

Sign in to receive your sealed letter.

The letter is composed from your actual solar return chart. That requires a saved birth profile — which requires an account. Free, 30 seconds.

Sign in / Create account What is this?
How it is composed

One letter. One chart. No templates.

Once a year, the Sun returns to the exact ecliptic longitude it held at the second of your birth. That moment is your solar return — astrologically, the chart that governs the year ahead. It wanders by up to two days from your birthday because Earth's orbit is mildly eccentric, so we compute it down to ±0.001° using bisection over our Meeus ephemeris.

The letter is then composed by a 120-billion-parameter language model — but the chart it sees is not generated by the model. We hand it your big-three, your solar-return Moon phase, and your slow-planet placements (Jupiter through Pluto) as ground truth. The model writes the prose; the math writes the chart.

The voice is one we wrote, not the model's default: literary, warm, sparing. No fear, no promises of marriage or money, no doom. Three paragraphs, around 350 words. Signed and dated. Read the full methodology.

Adjacent surfaces

A ritual built on an engine

The letter is the once-a-year ritual. The methodology, accuracy envelope, and ethics policy are what makes the rest of the year’s readings worth writing into a letter at all.

Or try it