The nine centers are the backbone of the bodygraph. In any given person each one is either defined (coloured in) or open. Plenty has been written about what the centers mean, and almost nothing about how rare each one is. So we computed it: 12,000 bodygraphs over a uniform sample of birth moments between 1940 and 2015. Here is the result.
How often each center is defined
- Throat: 70.4%
- Sacral: 68.3%
- G center: 60.6%
- Root: 59.0%
- Spleen: 58.1%
- Solar Plexus: 50.7%
- Ajna: 44.8%
- Heart (Ego): 36.3%
- Head: 24.3%
Almost a threefold gap between the first and last line. The Throat is defined in seven people out of ten, the Head in four out of sixteen. That is not a property of people but of the diagram: eleven channels lead into the Throat and only three into the Head. The more channels reach a center, the higher the chance at least one of them is filled.
What defined and open actually mean
A center becomes defined when at least one channel running into it is completely filled. A channel is a pair of gates on two different centers, and it has to be filled from both ends. So definition always arrives in pairs: it is impossible to have exactly one defined center.
Our calculation confirms that literally. Among 12,000 charts not a single one had exactly one defined center. Zero cases. Either there are none at all, or there are at least two.
How many centers people have defined
- 0 centers: 0.9% (these are the Reflectors)
- 1 center: does not occur
- 2 centers: 8.5%
- 3 centers: 10.1%
- 4 centers: 24.8%
- 5 centers: 24.0%
- 6 centers: 19.7%
- 7 centers: 8.8%
- 8 centers: 2.8%
- 9 centers: 0.5%
Half of all people have four or five centers defined. A fully defined bodygraph turns up in one person out of two hundred, and all nine open is rarer still.
The nine centers one by one
Head (24.3%) is about inspiration and questions, not answers. An open Head means picking up other people's questions and holding on to them longer than is useful.
Ajna (44.8%) is the way of thinking: analysis, concepts, certainty in your own view. Open in roughly half of people, and then the view shifts with the company.
Throat (70.4%) is the most frequently defined center. It is expression: speech, action, any conversion of the inner into the outer. Every other center ultimately works through it.
G center (60.6%) is direction and sense of self. Defined, it gives a steady answer to "who am I"; open, it makes a person sensitive to place and company.
Heart, or Ego (36.3%) is the least defined center after the Head. It covers willpower, promises and self-worth measured by results. An open Ego tends to prove its value where nobody asked.
Solar Plexus (50.7%) splits humanity almost in half. It is the emotional wave. Anyone with it defined has emotional authority and should not decide at the peak.
Sacral (68.3%) is life force and response. It is what separates a Generator from every other type: if the Sacral is defined, the type is a Generator variant.
Spleen (58.1%) is intuition in the present moment, health, survival. It speaks once and quietly, and will not repeat itself.
Root (59.0%) is pressure and pace. Defined, it gives you your own rhythm; open, it makes you hurry to somebody else's.
How to read open centers
A common mistake is to treat an open center as a weak spot. The calculation shows why that reading fails: half of all people have an open Solar Plexus and three quarters an open Head. If openness were a defect, the defect would be universal.
A more useful reading is this. A defined center works the same way always; it is your constant. An open center amplifies and distorts whatever comes in from outside, and that is exactly where people most often overestimate themselves or copy someone else's behaviour. The wisdom of an open center arrives with age, once the difference between your own and borrowed becomes visible.
To see your own configuration you need a bodygraph built on an exact birth time. Centers are computed from planetary longitudes at two moments, birth and roughly 88 days before it, so without a time the picture is incomplete.
In short
Across 12,000 computed charts the Throat is defined in 70.4% of people, the Sacral in 68.3%, and the Head in only 24.3%. Half of all charts have four or five defined centers, a fully defined bodygraph shows up in 0.5%, and exactly one defined center never happens at all.
Try building your bodygraph for free on AstroWay and see which of the nine centers are coloured in. To compare your design with the astrological side, use a natal chart.