Birth Chart Basics
Your chart ruler is the planet that rules your rising sign. It is the single most important planet in your chart, because wherever it sits is where the whole chart is pointed. Find your rising...
The rising sign sets the whole house system, so the planet that rules it has a claim on everything built on top. In traditional practice the chart ruler is read first after the Big Three, and its condition colours the entire reading: which sign it is in, which house it occupies, and what it is touched by.
It is the nearest thing a birth chart has to a main character. Two people with Libra rising both have Venus running the chart, and the difference between their lives starts with where Venus sits.
Take your rising sign and look up its ruler. Traditional astrology uses the seven visible bodies, which gives every sign a ruler and gives Mercury, Venus, Mars, Jupiter and Saturn two each. Modern practice reassigns three of them to planets discovered since 1781.
Both are in use. The traditional set is the one profections, dignity and most older techniques depend on, so it is the one this site reckons from, with the modern alternative noted.
Three questions, in order. Which sign is it in, which tells you how it operates. Which house is it in, which tells you where in your life the chart is focused. And what aspects does it make, which tells you what helps and what interferes.
A chart ruler in the 10th house points a life at career and public standing whatever else is going on. The same ruler in the 12th points it somewhere much quieter. Neither is better, and the difference is large.
| If your rising sign is | Traditional ruler | Modern ruler |
|---|---|---|
| Aries | Mars | Mars |
| Taurus | Venus | Venus |
| Gemini | Mercury | Mercury |
| Cancer | the Moon | the Moon |
| Leo | the Sun | the Sun |
| Virgo | Mercury | Mercury |
| Libra | Venus | Venus |
| Scorpio | Mars | Pluto |
| Sagittarius | Jupiter | Jupiter |
| Capricorn | Saturn | Saturn |
| Aquarius | Saturn | Uranus |
| Pisces | Jupiter | Neptune |
Virgo rising means Mercury runs the chart. Say that Mercury sits in Scorpio in the 3rd house, square Saturn. Now you have a specific person: someone whose whole chart is organised around thinking and communicating, who does it privately and intensely rather than lightly, in an area of life that covers writing and daily exchange, and who finds it effortful rather than natural.
Change one thing. Put the same Mercury in Leo in the 12th, and the chart is organised around something nobody sees, expressed warmly when it finally comes out. Same rising sign, same ruler, completely different life.
the Big Three, then how to read a birth chart, then how to find your birth time.
Everything on this page is general by necessity. A reading built from your own date, time and place is the version that names your placements rather than describing the categories they fall into. If you do not know your birth time, this covers how to find it.
The planet that rules your rising sign. It is read as the planet running the whole chart.
Find your rising sign, then look up its ruler in the table on this page. You need an accurate birth time to know your rising sign at all.
Traditional, if you want the older techniques to work, because they were built on it. Modern is widely used too and neither is wrong.
RubyAstro writes about astrology for reflection and self-understanding. Nothing here is medical, legal or financial advice, and none of it is a prediction of events. Read our full disclaimer.
Finding Your Birth TimeIf you were born in the US between 1945 and 1991, there is a real chance your birth time was recorded under a daylight saving rule your chart calculator does not know about. Here is how to check.
Your Age in AstrologyYour age tells you which house your year belongs to. It takes one piece of arithmetic, it works without software, and it is the fastest way to know what a year is about.
Finding Your Birth TimeMost of your chart does not need the hour. Every planet except the Moon stays in the same sign all day, and so does every aspect between them. Here is exactly what you keep, what you lose, and what to do about the gap.
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