Compute and interpret a chart in your browser
Every chart below is computed on this page by the caelus engine with its embedded dataset, then read: its validated facts are turned into a cited reading from a public-domain corpus. No server, no ephemeris files, nothing invented.
Search a birthplace and enter the local time (caelus-birth resolves the zone and historical DST to UT offline), then explore the chart across tabs: positions, aspects, fixed stars, and Sky View, which frames the visible sky at the chart’s moment and place as a pixel-precise prompt for an AI image model. The Facts tab lists the chart’s ranked, enriched fact atoms; Synastry compares two charts. The full cited reading sits at the foot of the panel, every statement grounded in a validated fact. Copy share link mints a chart whose URL carries only the values you typed, recomputed in the recipient’s browser. (Switch the time mode to UTC for the current sky.)
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Compare two charts
Synastry and the composite, both computed in your browser: two births in, the inter-chart aspect grid and the midpoint chart out. Birth times are local to each place (resolved to UT with caelus-birth).
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Charts worth reading
Four charts chosen for a striking reading. Click any one to load it into the builder above and read it in full: the wheel is the caelus-wheel renderer, and the interpretation is the public-domain corpus run over the engine’s facts.