Cast a Star Chart
Real positional astronomy running in your browser. Sun and Moon from Meeus, planets from JPL Keplerian elements, Ascendant and Midheaven from true sidereal time. Search any city in the world — the timezone is handled automatically.
Search for any city worldwide — we automatically look up the coordinates and compute the correct historical timezone and daylight-saving offset for your birth date. No manual UTC guessing required.
Members can save charts to their account and revisit them any time from the dashboard.
Today's transit wheel
The same renderer, fed the current moment instead of a birth moment. Members get an alert when a slow planet makes an exact aspect to something in their own chart.
Built on the same engine
Four tools powered by the same ephemeris that cast your chart above. Cast your natal chart first — the Solar Return and Saturn Return Clock use your birth data. The Void-of-Course Moon works for everyone, anytime.
Solar Return
Your chart for the exact moment the Sun returns to its natal degree each year. The solar return chart is cast for that precise instant at your current (or natal) location, and it sets the tone for the year ahead. Cast your natal chart above first, then click below.
Saturn Return Clock
A countdown to the transit everyone in their late twenties is already talking about. Saturn takes roughly 29.5 years to orbit the Sun and return to the exact degree it occupied at your birth. The first return (ages 27–30) is the astrological coming-of-age; the second (ages 56–60) is the reckoning. Cast your natal chart above first, then click below.
Void-of-Course Moon
Daily windows when the Moon makes no more major aspects before changing signs — the classic "don't start anything" hours. The Moon goes void when it makes its last Ptolemaic aspect (conjunction, sextile, square, trine, opposition) to another planet before entering the next sign. During these periods, traditional astrology advises against initiating new ventures. Things started under a VOC Moon tend to stall, drift, or need redoing. This works for everyone — no birth data needed.
Synastry
Two charts, one reading. We overlay both natal wheels, calculate every cross-aspect between your planets and theirs, and score the connection across passion, communication, stability, and growth. The result is a full PDF report delivered to your email — a deep compatibility analysis written in the Almanac's voice, with aspect-by-aspect interpretation and a relationship synthesis.
Get a Synastry Report — $22Already purchased one? Visit the birth data page to submit both charts.