Your Big 3: Sun, Moon and Rising Sign
The Big 3 are the three key positions in a natal chart: the Sun sign, the Moon sign and the Rising sign (Ascendant). They are calculated from your date, time and place of birth. The Sun changes sign once a month, the Moon every 2.3 days on average, and the Rising sign in Sofia every 1 h 8 min to 2 h 35 min.
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The three points
What is the Big 3?
The Big 3 is the short reading of a natal chart: the Sun sign, the Moon sign and the Rising sign. The Sun sign is the one everyone knows from horoscopes, but it is only a third of the picture. The Moon and the Ascendant often explain why two people with the same Sun sign can be so different.
The time decides for the two fast points. The Ascendant changes roughly every two hours, and on borderline days an hour of difference can produce a different Moon sign too.
| Point | Depends on | Time in a sign |
|---|---|---|
| Sun | the date | 29 to 31 days |
| Moon | the date and the time | 2.3 days on average |
| Rising sign | the time and the place | 1 h 8 min to 2 h 35 min |
Sun sign: who you are at your core
In traditional astrology the Sun sign shows your core identity: your will, your ambitions and the way you want to be seen. It is set by the Sun’s position on the day you were born and changes roughly once a month, which is why it is the only one of the three you usually know without a calculator.
In a sign for 29 to 31 days
Moon sign: your emotional world
By tradition the Moon sign describes your emotional world: how you react instinctively, what you need to feel secure, and how you experience closeness. The Moon changes sign every 2–3 days, so the date alone is not always enough: on borderline days the exact time decides.
In a sign 2.3 days on average
Rising sign: how others see you
The Ascendant is the sign that was rising on the eastern horizon at the moment of your birth. In the tradition it shapes the first impression you make and your approach to anything new. It changes about every two hours, which is why the exact time matters. If you don’t know yours, check your birth certificate or ask your parents, or tick “I don’t know the time of birth”: the calculator then uses 12:00 noon, local time at the place of birth.
In Sofia from 1 h 8 min to 2 h 35 min
The next step
After the Big 3: the natal chart
The Big 3 is where most people start. The next step is the free natal chart with every planet and house. The button “See your full natal chart” under the result above carries your data over.
Free natal chartAscendant CalculatorMoon Sign Calculator
The full natal reading reads the whole chart from the same data, from character and love to calling and practical guidance.
29.99 €one-time · online and PDF
See the full readingThe Big 3
Frequently asked questions
Why do I need my exact birth time?
The Ascendant changes roughly every two hours as the Earth rotates. An hour of difference can produce a different Rising sign, and on borderline days a different Moon sign too. Your Sun sign is almost always calculated correctly from the date alone. If the time is approximate, the Ascendant Calculator shows how long each sign takes to rise, that is, how wide the window of doubt is.
What is the difference between the Big 3 and a natal chart?
The Big 3 is the short version: three positions out of dozens in a full natal chart. The natal chart adds Mercury, Venus, Mars and the remaining planets, the 12 houses and the aspects between them. The full natal chart is free as well.
Next steps
More about the signs
The interpretations follow the astrological tradition, for educational and entertainment purposes, and should not be taken as professional advice.