Sky

The birth chart that shows its work.

Every astrology app gives you an answer. None of them tell you which parts are measured, which parts are a convention someone chose, and which parts cannot be checked at all. This one does, and separates them on the page.

1 · The moment

Time matters more than people think. An hour of error moves the Ascendant about 15° — half a sign. We resolve your local time to UTC using the full historical timezone database, so wartime clock changes and old daylight-saving rules are handled properly rather than assumed away.

2 · The sky

Planet positions are measured. The ring divisions and house cusps are chosen.
Zodiac chosen
Houses chosen

Show

3 · The numbers, and how to check them

Each row links to NASA’s JPL Horizons for that exact body at that exact instant. Follow it and you get their number, computed independently of us, in the same frame. If ours is wrong, that link is how you catch us.

Body Longitude Sign & degree chosen House chosen Motion Check

4 · The disagreement

This is the part other apps hide. The sky is one thing; the reading of it depends on choices made centuries ago that practitioners still do not agree on. Here is how much your own chart moves when you change nothing but the convention.

5 · The honest ledger

Every claim this page makes, sorted by whether it can be checked. Nothing here is hedged for comfort in either direction — the astronomy is genuinely precise, and the meaning genuinely cannot be tested.