Anyone who watches the sky for a few months notices a curious phenomenon: the planets, which usually advance from west to east against the stars, at some point slow down, stop, go backwards for a few weeks and then resume their course. This apparent motion, called retrograde, fascinated and puzzled astronomers for centuries, and in astrology it acquired a precise symbolic meaning.
Why planets seem to move backwards
Retrograde motion is an effect of perspective. All the planets, the Earth included, orbit the Sun at different speeds.
- The outer planets (Mars, Jupiter, Saturn) appear retrograde when the faster Earth "overtakes" them on its inner orbit. It is like a car on the motorway passing a lorry: for a moment the lorry seems to move backwards against the distant landscape.
- The inner planets (Mercury and Venus) appear retrograde when, on their faster inner orbit, they pass between the Earth and the Sun.
The Sun and Moon are never retrograde. For the ancients this was a sign of their different and superior nature.
Epicycles
In Ptolemy's geocentric model retrograde motion was explained by epicycles: each planet moved on a small circle whose centre in turn travelled along a larger circle around the Earth. The system was complex but allowed accurate predictions, and it remained in use for more than a thousand years, until the Copernican revolution.
The stations
Before reversing its motion, a planet slows until it seems motionless for several days: this is the station. There are two in each cycle:
- the retrograde station, when the planet stops and begins to move backwards;
- the direct station, when it stops again and resumes ordinary motion.
In tradition a stationary planet was considered particularly intense, because its symbolic influence is concentrated for a long time on the same degree.
How often it happens
| Planet | Indicative frequency | Indicative duration |
|---|---|---|
| Mercury | Three or four times a year | About three weeks |
| Venus | About every nineteen months | About forty days |
| Mars | About every two years | More than two months |
| Jupiter | Once a year | About four months |
| Saturn | Once a year | About four and a half months |
The outer planets are retrograde when they stand in opposition to the Sun, that is, when they are closest to Earth and brightest in the night sky. It is an interesting detail: precisely when they "go backwards", they shine most brightly.
The meaning in tradition
In classical astrology retrogradation was an accidental debility: it did not take away the planet's nature, but made its action less straightforward. William Lilly, in his scoring system, counted it among the most unfavourable conditions. A retrograde planet was described as someone walking backwards: they may arrive, but with delays, second thoughts and returns.
In horary astrology a retrograde significator could indicate that a person would come back, that a lost object would be found, or that a matter would be resolved late or unexpectedly. In electional astrology one avoided starting important ventures when the key planets were retrograde.
Mercury retrograde
The most popular case today is Mercury retrograde, blamed for misunderstandings, travel delays and communication problems. Beyond the exaggerations of popular culture, the symbol is coherent: Mercury rules speech, exchange and movement, and its apparent return invites you to reread, recheck and reconsider.
At Studio Esoterico Cornelio the suggestion is to live these periods as phases of "re-": review, resume, repair, rethink. They are not times to fear but to use for whatever needs a second look.
Retrograde planets in the birth chart
A planet retrograde at birth is not a defect. Many astrologers read it as an energy turned inward, expressing itself in a more reflective, personal or late-blooming way. A natal Mercury retrograde, for instance, may indicate thinking that needs time to mature before it is expressed, but which for that very reason is often deep.
A practice for retrograde periods
- Note the date of the planet's retrograde station and the area it rules in your chart.
- During the retrograde phase, pick up a project left half-finished in that area.
- Avoid, if possible, starting from scratch anything important that is not urgent.
- At the direct station, write down what you have understood and move ahead with decisions.
In short
- Retrograde motion is an effect of perspective caused by different orbital speeds.
- The Sun and Moon are never retrograde; the other planets are, with different rhythms.
- Stations are moments of apparent stillness and symbolic intensity.
- Tradition considered retrogradation an accidental debility, linked to delays and returns.
- Today these periods can be lived as times of review, not of fear.