How to read a natal chart

A natal chart is easier if you refuse to read everything at once. Start with the Big Three — Sun, Moon, rising — then the houses that actually contain planets, then the tightest major aspects. The wheel is a map. The tables are the instrument. Numbers first: sign, degree, house, orb. Text second. That order keeps you from drowning in twelve sign essays before you know which rooms are occupied.

You need birth date, time and place for the full method. If time is unknown, drop rising and houses and read planets in signs plus aspects. SideraChart follows that split. Do not “how to read a natal chart” your way around a missing clock by pretending noon is data. Write the gap on the page.

Sun is the daylight plot, from the date. Moon is the faster inner weather; check whether it changed sign that day. Rising is the eastern horizon and only exists with a time. Read whether the three rhyme or argue. Then look at aspects among them with orbs of 8° / 6° / 4°.

If you only have the Sun, you do not yet know how to read the chart; you know one coordinate. SideraChart’s wheel puts those three glyphs where you can see them before you hunt for asteroids or hypothetical points this site does not use.

Houses are local departments. A planet in the tenth is not the same as that planet in the fourth, even in the same sign. List the houses that contain bodies. Those are the loud rooms. Empty houses are not defects; they are rooms without a planet sitting in them. There is a separate article for that.

SideraChart defaults to Placidus because most Western texts assume it. Whole Sign is the other grid. Polar latitudes above about 66° should not force broken Placidus cusps. If the time is unknown, skip this entire step. Planet-in-house language without an Ascendant is fiction.

Aspects are named angles: conjunction, sextile, square, trine, opposition. Sort by orb, tightest first. A 0.4° Sun–Saturn conjunction outranks a 7.8° Mars trine. SideraChart draws the five majors and lists applying or separating in the table. Hide the lines on the wheel if the drawing is noisy; the table remains.

Do not moralise aspects. Squares are friction that builds a skill if you work them; they are not curses. Trines are ease that can go lazy. Conjunctions fuse functions. Oppositions polarise. Keep the geometry. Drop “the universe wants.”

The outer ring is signs. The inner divisions are houses. Glyphs sit on longitudes. Coloured lines are aspects. Open a table row for the exact sign, house and degree. The written cards under a saved chart are a cached interpretation layer, not a live language model inventing new physics.

A PNG export is a snapshot for sharing. The live tables are what you reread. If another site disagrees, match tropical zodiac, Placidus, and the same birth time zone before you blame ephemerides. SideraChart uses astronomy-engine (VSOP87), not Swiss Ephemeris. Differences of a few arcminutes are expected; a whole sign usually means a sidereal setting or a wrong clock.

Calculate the chart. Confirm date, time, place, tropical, Placidus. Read Sun, Moon, Ascendant. Scan occupied houses. Sort aspects by orb. Only then open sign-by-sign copy. Save the chart if you want the report and the daily cabinet. Transits in the cabinet are stored at noon natal time; they are a later step, not step one of reading the natal.

Keep a working note of three facts only at first: the Big Three, the most occupied house, the tightest aspect. That is a natal-chart reading you can actually finish. Expand to rulers of empty houses and slow transits after those three facts are stable.

Stop before medical, legal or financial conclusions. The method is: coordinates, then structure, then cautious language. If you skip the coordinates, you are reading a horoscope column, not a natal chart.

Reread the same chart a week later using the same order. The wheel does not change; your eye does. If a new detail appears, check it against the table. If it does not exist in the numbers, it is not in the natal chart, however attractive the sentence.