Why this page exists
A navigation bar is a fixed number of destinations, not a projection of a catalogue. This site has thirty-nine pages, and putting them all in the header was measured on a sister site as 1,070 pixels of navigation that wrapped onto a second row and doubled the height of the header on every page at once. So the header carries four links and the fourth one points here.
That is also the honest place to say what the site is. It is seven small instruments and a reference library, run as one of a handful of independent web tools, funded by advertising and selling nothing. It is not a horoscope publisher, it does not have a newsletter, and it will never ask for an email address.
What the tools share
- They run on your device. The site is static files; the astronomy ships with the page. There is no server to send a birth date to.
- They state their accuracy. The Sun to better than a hundredth of a degree, the Moon to about ten arcseconds, computed from published series rather than looked up — and checked in the site's own tests against Meeus's worked examples, real new moons and twenty-nine published Chinese New Year dates.
- They name their choices. The triplicity decans rather than the Chaldean; the Lahiri ayanamsa rather than one of the four alternatives; the Chinese calendar evaluated at UTC+8. Where a school disagrees, the page says so instead of hiding it.
- They refuse to issue a verdict. Every pairing gets an ease and an edge. Nothing here predicts an outcome or assesses a person, and none of it is medical, psychological, legal, financial or safety advice.
Where to start
If you arrived for compatibility, the two-person reading takes ten seconds and the angle behind it is explained here. If you arrived because of something you saw on social media, it is probably the moon phase pairing — and the honest history of that claim is worth two minutes. If you are here because somebody told you your star sign had changed, start with the wobble.