Your year ahead, in a letter.

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.