What is a transit?
Where the planets are now, measured against the chart you were born with — and why that is the engine of every monthly reading.
Your birth chart is a single moment held still: the exact arrangement of the sky at the minute you were born. It does not change. A transit is what happens when the sky keeps moving and the planets, as they travel now, pass over the fixed points of that birth chart.
That is the whole idea. The natal chart is the instrument; the transits are the music played across it. When a reading speaks about "this month," it is reading the transits — where Venus or Saturn or the Moon stands today, and what it touches in the chart you were born with.
Why a reading is built on them
A sun-sign horoscope speaks to a twelfth of the planet at once. A transit-based reading does not. It looks at where a moving planet falls against your particular placements, so the same week in the sky lands differently for two people born a day apart. This is what lets a reading be written for one reader rather than for a category.
The transits are, quite literally, the engine of the monthly reading. The natal chart sets who you are; the transits set what the season is asking of you now.
Fast movers and slow movers
Not all transits move at the same pace, and the pace is most of the meaning.
The Moon is the quickest. It changes sign every two or three days, which is why it governs mood and the small weather of a week rather than the shape of a year. The Sun, Mercury, Venus, and Mars move at a more human speed — weeks to months — and tend to mark the chapters of a season.
The slow movers are the ones that change a life. Jupiter takes about a year in a sign; Saturn around two and a half. Uranus, Neptune, and Pluto move so slowly that a single transit can last for years. When a reading describes something foundational — a long restructuring, a slow opening — it is usually one of these outer planets at work.
Orbs and timing, in plain words
A transit is not a light switch. It does not begin the instant a planet reaches an exact angle and end the instant it passes.
Astrologers use the word orb for the window of influence around that exact point — the approach, the peak, and the wane. A transit can be felt as it draws close, intensifies at exactness, and lingers as it separates. With the slow planets there is a further wrinkle: a planet can reach a point, turn retrograde and pass back over it, then turn direct and cross a third time. That is why some themes arrive, recede, and return across a year rather than landing once and clearing.
So when a reading marks a particular week, read it as the centre of a window, not a single dated event. The sky rarely keeps appointments to the hour. What it does, reliably, is set a tone you can work with — and a transit-based reading is simply the practice of naming that tone for the chart that is yours.