A natal chart is a snapshot of the sky at the moment you were born. Where each planet was, which zodiac sign held it, which house it fell into. Astrologers have been drawing this picture for thousands of years. The picture changes every four minutes, so two people born on the same day, at the same hospital, even an hour apart, can have meaningfully different charts.
That picture is what Eira opens with.
What is actually on the wheel
Three layers sit inside the circle.
The zodiac ring — twelve 30-degree slices, Aries through Pisces. This is the "where in the sky" layer.
The houses — twelve life-area pies (relationships, work, money, home, spirit, and so on). Houses come from your time and place, not your date, which is why Eira asks for both.
The planets — ten classical points (Sun, Moon, the eight planets), plus the lunar nodes that astrologers read for karmic themes. Each planet lands in a sign and a house. That landing is half the meaning. The other half comes from the angles planets make with each other, called aspects.
Why time matters more than people think
Your Sun sign moves once a month. Your Moon sign moves every two-and-a-half days. Your rising sign moves every two hours.
The rising sign sets up the whole house grid. Without it, the houses are approximate. Eira will still build a chart with date and place alone, and mark anything time-sensitive as such, but if you can dig up your birth certificate, do.
What Eira does with all this
Eira reads the chart the way an astrologer would: which planets dominate, which houses are loaded, which aspects make a story. It then walks you through:
- a foundational read — the broad strokes of your chart
- seven spheres of life, each tied to the houses and planets that govern it
- karmic patterns from the lunar nodes
- daily, weekly, and monthly forecasts based on current transits
And when you have a question that doesn't fit a tidy section, the AI chat is right there.
You bring the date, time, and place. Eira does the rest.
What a natal chart is made of
Planets — what acts
Ten points, each with its own job. The Sun is will and direction. The Moon is feeling and need. Mercury is thought and speech. Venus is love and taste. Mars is action and anger. Jupiter is growth and meaning. Saturn is limits and responsibility. Uranus, Neptune and Pluto move slowly, set the theme of a generation, and speak loudest where they touch personal points.
Signs — in what manner
A sign does not make a planet "good" or "bad." It sets the style: Mars in Aries acts head-on, Mars in Cancer goes around.
Houses — where exactly
Twelve sectors anchored to the horizon. The planet and sign say what and how; the house says in which area of life — work, home, relationships, money.
Aspects — how the points connect
The angles between planets. A conjunction merges two themes. An opposition pulls in two directions. A square is a conflict that forces action. Trines and sextiles are what comes easily — and is therefore often taken for granted.
What a natal chart does not do
It does not predict events. It describes a structure, not a script.
It does not assign a fate. Two people live the same configuration in completely different ways.
It does not diagnose and does not replace a doctor, a lawyer or a therapist.
It does not judge. There are no bad planets in a chart — only ones that are harder to negotiate with.
Frequently asked questions
What do I need to build a natal chart? Your date, time and place of birth. Without the time there is no Ascendant and no houses.
Does a natal chart change? No. It is built for the moment of birth. What changes are transits — where the planets are today relative to your chart.
What should I look at first? The big three: Sun, Moon and Ascendant. After that, the houses where planets cluster.
Why do twins have different charts? A difference of even a few minutes shifts the Ascendant and the houses, and the Moon moves on by a fraction of a degree.
How long does the calculation take in Eira? Seconds. The long part is not the calculation but the reading: what this particular configuration means for you.