ALVEM
What is a Transit Chart?
The planets keep moving after the moment you were born. A transit chart takes the question "where is the sky right now" and compares the answer against your fixed birth chart — it is astrology's most widely used "what is happening now" technique.
A fixed chart, a moving sky
Your birth chart never changes; it is a photograph frozen at one moment. The real planets, however, do not stop: the Moon changes sign every two or three days, Jupiter takes about a year, Saturn about two and a half. A transit is when a planet's actual current position forms a particular angle to a point in your birth chart — usually a planet, or an angle such as the Ascendant.
An example: if transiting Saturn squares the Sun in your birth chart, this is called "Saturn squaring my Sun", and is generally associated with themes of discipline, responsibility, or feeling constrained.
Slow planet or fast planet
| Planet | Time in one sign | Typical duration of effect |
|---|---|---|
| Moon | ~2.5 days | Hours — daily mood |
| Mercury / Venus / Mars | Weeks | Days — short-term events |
| Jupiter | ~1 year | Months — periods of opportunity and expansion |
| Saturn | ~2.5 years | Years — periods of building and testing structure |
| Uranus, Neptune, Pluto | 7-20+ years | Generational, slow transformations in the background |
Transits from fast planets are like daily or weekly noise — something is always happening, and most of it passes. Transits from slow planets are rare, and tend to be felt as the beginning or the end of a chapter.
Why the same transit is lived differently by everyone
It is true that transiting Jupiter is in the same sign for the whole world at once — but because every birth chart is different, that transit lands in a different house and touches a different planet for each person. The general talk of a "Jupiter period" is in reality experienced very differently from person to person, which is why the real meaning of a transit must always be read together with your own birth chart.
Natal Chart
The fixed foundation a transit is compared against.
Progressions
The same question approached with different mathematics.