Reading your calculated chart

A calculated chart on this platform comes in two layers: a short reading chosen from fixed, source-cited texts, and the calculated values underneath it. Every value was produced by a deterministic calculation service and is presented with the convention that produced it; the tables sit in the collapsed Technical details & sources section below the reading. This lesson walks through them so that nothing on the page is mysterious.

Body positions

The first table lists the ten bodies the platform calculates, one row each with its sign, degree, longitude, motion and house. The column that actually carries the information is the ecliptic longitude: a single angle measured around the circle of the ecliptic. Those angles come from a published planetary ephemeris (a fitted, peer-reviewed solution for the motions of the Sun, Moon and planets) rather than from an estimate made in your browser.^[1]

• Sign: which twelfth of the circle that longitude fell in.
• Degree in sign: how far into that twelfth it fell.
• Motion: whether the body was moving direct, retrograde or was stationary as seen from Earth.
• House: which house the same longitude fell in, under the stated system.

Angles, cusps and placements

The Angles table reports the Ascendant and Midheaven: the points where the ecliptic meets the eastern horizon and the meridian at your time and place. The House cusps table gives the boundary longitude of each of the twelve houses. Under Whole Sign, the system this platform uses, the cusps coincide with sign boundaries and every house is one whole sign wide.^[2]

Practitioners have divided the houses differently for centuries, and the early modern manuals worked from tabulated quadrant cusps rather than sign boundaries. The platform does not attempt to settle that; it names the system in use on the page so you always know which convention produced the houses you are reading.^[3]

The wheel is a drawing, not a second opinion

The chart wheel places each marker from a returned longitude alone. It derives nothing: no sign, no degree, no house, no relationship between one marker and another. If a wheel and a table ever disagreed, something would have been computed in the browser, which the platform's calculation boundary forbids. The tables are the wheel's text alternative and carry the exact numbers.

Availability: the most honest table on the page

The Availability table states what the service could and could not calculate, and the Not calculated list gives the machine-readable reason for each gap. This matters most when the birth time is unknown: the angles and houses genuinely cannot be derived, so the platform reports them as not calculated. It does not assume noon, does not assume midnight, and does not offer an approximate Ascendant.

What the page will not do

• It shows no aspects. Aspect geometry exists in the calculation service, but the guest chart surfaces none, and the browser may never derive them.^[2]
• It offers no house system other than Whole Sign.
• Its reading predicts nothing and gives no advice: every sentence is a fixed, source-cited text chosen by the calculated placements, not written about you.
• It stores nothing. No account, no saved chart, no birth data in the address bar.