The chart wheel, decoded
How to read a natal chart wheel
The wheel looks intimidating — twelve slices, strange glyphs, coloured lines spidering across the middle. It's really just a map of the sky at your birth, flattened into a circle. Read it in this order and it becomes legible.
1. Orient yourself: the Ascendant is 9 o'clock
The chart is a circle divided into twelve slices. The horizontal line across the middle is the horizon at the moment of your birth. The left edge — where 9 sits on a clock — is the eastern horizon, the point where the sky was rising.
- Ascendant (AS) — left edge, 9 o'clock. The sign rising in the east.
- Descendant (DS) — right edge, 3 o'clock. Directly opposite the Ascendant.
- Midheaven (MC) — top, 12 o'clock. The highest point of the sky at birth.
- Imum Coeli (IC) — bottom, 6 o'clock. Opposite the Midheaven.
2. Count the houses counter‑clockwise
The twelve slices are the houses. They are numbered starting from the Ascendant and running counter‑clockwise — so the 1st House sits just below the horizon on the left, and the 12th House sits just above it.
Each house rules a life area (self, money, communication, home, and so on). Whichever house a planet lands in is the arena that planet plays out in. For the meaning of each of the twelve houses, see the building‑blocks guide.
3. The outer ring: zodiac signs
Wrapped around the outside of the wheel are the twelve zodiac signs — each one covering 30° of the circle, for 360° total. The sign that lands on the Ascendant is your Rising sign. The rest of the wheel is stamped with signs in order from there.
4. The planet glyphs
Inside the ring, small symbols mark where each planet sat at your birth. Each glyph is followed (or preceded) by a number — the degree within that sign, from 0° to 29°.
Tight cluster of glyphs in one slice? That's a stellium — a major life theme concentrated in one sign and house.
5. The lines through the middle: aspects
The coloured web across the centre of the wheel is the aspect grid — each line is a geometric angle between two planets. Colour usually signals the flavour:
- Trine (120°)Long line — harmony, flow.
- Sextile (60°)Short line — opportunity, ease.
- Square (90°)Right angle — tension, growth.
- Opposition (180°)Line across the wheel — polarity.
- Conjunction (0°)Planets stacked — fusion.
Tighter is louder. An aspect within 3° hums; one within 8° is background music; wider than 10° is mostly noise.
6. A reading order that works
- Note the Ascendant sign — your outer style and the ruler of the whole chart.
- Find the Sun and Moon — sign, house, and any tight aspects.
- Scan for stelliums or an obviously packed house.
- Locate the chart ruler (the planet ruling your Rising sign) and read its position — it colours everything.
- Follow the tightest aspect lines and name the two planets they connect.
- Finish with Saturn onward — the outer planets carry the long, slow themes.
7. The one‑sentence formula
Every line of a reading is a variation of one sentence:
A planet (what energy) in a sign (how it expresses) in a house (where it plays out), shaped by aspects to other planets.
See your own wheel
Generate your natal chart and read it alongside this guide — then ask AS33 anything you can't place.