Rules the 4th house.

Exalted in Taurus (honoured guest). In detriment in Capricorn (weakened, opposite its home). In fall in Scorpio (weakest, opposite its exaltation). Governs emotion, instinct, habit, memory, and the mother. Rules the stomach and bodily fluids.

If the Sun is who you are, the Moon is what you need. It governs the inner life: feeling, instinct, memory, appetite, and the conditions under which a person feels safe enough to be themselves. It is the most private placement in a chart and frequently the most accurate — what a person is like when nobody is watching, and what they reach for when tired, frightened or unwell.

The Moon is the fastest body in the sky, changing sign every two and a half days and completing the zodiac in a month, so it is also the most personal. Two people born on the same day can hold different Moons, and the difference between them is considerable. It reflects rather than generates light, which is exactly its function: the Moon receives, holds, and gives back in altered form.

What it governs: emotional needs and habits, instinctive reactions, memory both personal and inherited, the body's rhythms, and the mother or the mothering function in a life — whoever supplied, or failed to supply, the early sense of safety. It also carries the past, which is why lunar placements so often describe patterns formed before they could be chosen.

Its difficulty is that the Moon does not reason. It repeats. Lunar patterns are the ones a person returns to under pressure regardless of what they know, which is why insight alone rarely shifts them.

And because the Moon is need rather than want, it is frequently at odds with the Sun — a person may be pulled toward what they need and what they intend in two different directions at once. Reconciling those two placements is a good deal of what any life consists of.

Rules the 3rd house and the 6th house.

Exalted in Virgo (honoured guest). In detriment in Sagittarius and Pisces (weakened, opposite its home). In fall in Pisces (weakest, opposite its exaltation). Governs communication, reasoning, commerce, and short journeys. Rules the nervous system, hands, arms, and lungs.

Mercury is the mind at work. It governs thought, perception, language, learning, and the carrying of meaning from one place to another — how a person takes information in, sorts it, and gives it back out. It is the messenger of the system, and the only planet with a foot in two very different territories: Gemini's breadth and Virgo's precision, connection and analysis, the mind that ranges and the mind that refines.

It never travels far from the Sun and is often found in the same sign, which is why identity and thought tend to run together. It also turns retrograde three times a year — more than any other planet — and those periods are read as the mind's natural revision cycle: a return to what was said, decided or overlooked. The tradition treats Mercury as neutral in itself, taking on the character of whatever it touches, which is a fair description of a faculty that can serve any purpose asked of it.

What it governs: reasoning and how it proceeds, speech and writing, memory in its working sense, commerce and negotiation, short journeys, siblings, and the daily traffic of correspondence. Where Mercury falls in a chart describes what a person naturally thinks about, and the register in which they think about it.

Its difficulty is that Mercury is genuinely amoral. It is skill without direction — capable of clarifying and equally capable of persuading, and the same facility that explains well can talk its way around anything, including its own better judgement.

A strong Mercury does not make a person right. It makes them articulate, which is not the same thing and is frequently mistaken for it.

Rules the 2nd house and the 7th house.

Exalted in Pisces (honoured guest). In detriment in Aries and Scorpio (weakened, opposite its home). In fall in Virgo (weakest, opposite its exaltation). Governs love, beauty, harmony, and money. Rules the throat, kidneys, and venous system.

Venus is the principle of attraction and value. She governs love, beauty, pleasure, harmony, and the question of what a person considers worth having — which is why she rules both possessions and partnership, the two things a life is most often organised around. What Venus describes is not desire in the driving sense, which belongs to Mars, but the quality of being drawn toward something, and the capacity to enjoy it once it arrives.

Her two signs divide her nature cleanly. In Taurus, Venus works through the senses: touch, taste, comfort, the pleasure of what can be held. In Libra, she works through relation: fairness, proportion, beauty as balance, the pleasure of another person's company. Possession and connection, the same faculty in two registers. She stays close to the Sun, never more than two signs away, and turns retrograde only once every eighteen months — rarely enough that those periods are significant when they come.

What she governs: love and affection, aesthetic taste, money and resources, social grace, art, and the standards by which a person judges anything to be good. Where Venus falls describes what someone finds beautiful and how they go about being close to it.

Her difficulty is that Venus wants ease, and ease is not always what a situation requires. A strong Venus can produce a person who avoids necessary conflict, accommodates past their own interest, or mistakes pleasantness for rightness.

She is also the planet most easily indulged: the same capacity for enjoyment becomes, unchecked, a reluctance to tolerate anything that is not enjoyable.

Rules Aries the 1st house.

Exalted in Capricorn (honoured guest). In detriment in Libra (weakened, opposite its home). In fall in Cancer (weakest, opposite its exaltation). Governs action, desire, courage, and conflict. Rules the muscles, blood, and adrenal glands.

Mars is will. It governs desire in its driving form, courage, anger, competition, and the capacity to act rather than merely intend — the faculty by which something wanted becomes something done. Where Venus is attraction, Mars is pursuit; where the Sun is who you are, Mars is what you are prepared to do about it.

It takes six to seven weeks to cross a sign, considerably longer when retrograde, and it turns retrograde roughly every two years — periods traditionally read as energy turned inward, when action is frustrated and best redirected rather than forced. Mars once ruled Scorpio as well as Aries; the modern assignment of Pluto to Scorpio left Mars with a single sign, which arguably sharpened its character rather than diminishing it.

What it governs: physical energy and stamina, assertion, conflict and how it is conducted, sexuality in its appetitive aspect, courage, and anger. Where Mars falls in a chart describes what a person will fight for, and what they will fight about — often two different lists.

Its difficulty is obvious enough, and worth stating precisely: Mars does not distinguish between necessary force and unnecessary force. It supplies energy and leaves the judgement to other planets.

Badly placed or badly used, it produces aggression, haste, injury and burnt bridges. But the absence of Mars is no better. A person unable to assert themselves, defend what matters, or say no plainly has a Mars problem quite as much as a person who cannot stop fighting.

Rules the 9th house.

Exalted in Cancer (honoured guest). In detriment in Gemini (weakened, opposite its home). In fall in Capricorn (weakest, opposite its exaltation). Governs expansion, growth, belief, and abundance. Rules the liver, hips, and thighs.

Jupiter is expansion. It governs growth, faith, meaning, generosity, and the impulse to go beyond what is presently the case — the sense that there is more, and that reaching for it is worthwhile. Traditionally called the greater benefic, it describes where a life opens up and where fortune tends to find a person.

It spends roughly a year in each sign and twelve in the full circuit, which means it returns to its birth position every twelve years — a rhythm many people can feel in retrospect, marking out the expansive chapters of a life. Because a year is long enough to be shared and short enough to be personal, Jupiter sits between the personal planets and the generational ones.

What it governs: growth of every kind, higher learning and philosophy, travel and the foreign, religion and belief, publishing and teaching, law, and generosity both given and received. Where Jupiter falls in a chart is where a person is naturally abundant, naturally optimistic, and where good things arrive with less effort than elsewhere.

Its difficulty is that expansion does not know when to stop. Jupiter has no braking mechanism of its own; that is Saturn's function. Unchecked it produces excess, overconfidence, promises made larger than they can be kept, and a tendency to believe that more is inherently better.

The tradition calls Jupiter fortunate, and it is — but a run of good fortune is not the same as good judgement, and the two are easily confused by those enjoying the first.

Rules the 10th house.

Exalted in Libra (honoured guest). In detriment in Cancer (weakened, opposite its home). In fall in Aries (weakest, opposite its exaltation). Governs discipline, structure, time, and limitation. Rules the bones, teeth, joints, and skin.

Saturn is limitation, and the teacher of the chart. It governs time, structure, discipline, consequence, and the lessons that arrive as difficulty and leave as competence. Traditionally called the greater malefic, which overstates the case: Saturn is not malicious, it is exacting. What it withholds it withholds until earned, and what it gives it does not take back.

It takes two and a half years to cross a sign and twenty-nine to complete the circuit, which produces the Saturn return — the passage in the late twenties when Saturn arrives back where it began, and a person is asked to account for the structures they have built. A second return follows in the late fifties. These are among the most reliably felt transits in astrology, and among the most useful.

What it governs: discipline, endurance, authority, responsibility, boundaries, time itself, and the slow accumulation of anything worth having. Also fear, restriction, and the places where a person feels insufficient. Where Saturn falls in a chart describes where life will be hardest and where, eventually, a person will be most competent — the two locations being the same one.

Its difficulty is not that Saturn causes hardship. It is that Saturn's hardship arrives before its reward, sometimes by decades, and there is no way to reverse the order.

People frequently give up on their Saturn placement in their thirties, not understanding that it was always going to take until fifty. Saturn is the planet that punishes impatience and rewards nothing else so reliably as staying.

Rules the 11th house.

Governs rebellion, innovation, and sudden change. Rules the nervous system and ankles.

Uranus is awakening. It governs sudden change, liberation, originality, rebellion, and the breaking of whatever has grown too settled to serve. Where Saturn builds structure, Uranus asks whether the structure should exist — and is entirely willing to remove it without notice.

It spends about seven years in each sign and eighty-four in the full circuit, which places it at the boundary between personal and generational. Everyone born within a seven-year span shares its sign, so what it describes belongs partly to a cohort rather than an individual; but its position by house is personal, and its transits are among the most disruptive a chart records. The Uranus opposition in the early forties — when it reaches the point opposite its birth position — is the astrological account of the midlife upheaval.

What it governs: innovation, invention, technology, sudden reversal, freedom and the demand for it, the collective and the future, and anything that breaks with what came before. Where Uranus falls describes where a person is unconventional, where they will not be constrained, and where the unexpected tends to happen to them.

Its difficulty is that Uranus does not negotiate. It does not gradually loosen what is too tight; it breaks it, and it does so at a moment of its own choosing. Change under Uranus is rarely comfortable and frequently arrives as loss before it arrives as freedom.

The tradition's counsel is worth having: what Uranus takes was usually already finished, and what it interrupts was usually already false. That is easier to accept afterwards than during.

Rules the 12th house.

Governs dreams, illusion, and spirituality. Rules the lymphatic system and feet.

Neptune is dissolution. It governs imagination, compassion, spirituality, dreams, and the boundary between one thing and another — specifically, the softening of that boundary until self and other, real and imagined, begin to run together. It is the most difficult planet to describe precisely, which is entirely in character.

It spends fourteen years in each sign and one hundred and sixty-five in the circuit, so it is thoroughly generational: its sign describes an era's collective imagination rather than an individual's. Its house placement and its aspects are what belong to a person, and its transits are slow enough to be felt as a change of atmosphere rather than an event.

What it governs: spirituality and mysticism, art and the imagination, compassion and the capacity to identify with another's suffering, dreams, and the longing for something beyond the material. Also illusion, deception, escapism, addiction, and self-deception in all its forms — which are not a separate list but the same faculty pointed elsewhere. Where Neptune falls describes where a person is most open, most inspired, and least able to see clearly.

Its difficulty is exactly that last pairing. Neptune's gift and Neptune's problem are one thing: the dissolving of boundaries. It produces the artist and the mystic, and it produces the person who cannot tell what is actually happening.

There is no version of Neptune that gives the vision without the vulnerability, and the work of any Neptune placement is learning to keep one foot on the ground while the other is elsewhere.

Rules the 8th house.

Governs transformation, power, and rebirth. Rules the reproductive organs.

Pluto is transformation in its most absolute form. It governs power, depth, the unconscious, and the passages through which something is destroyed so that something else can exist. Where the other planets change circumstances, Pluto changes the person — and it does so slowly, thoroughly, and without consultation.

It takes between twelve and twenty years to cross a sign, depending on where it is in its irregular orbit, and two hundred and forty-eight for the full circuit, which no one lives to complete. It is the most generational of all the bodies: its sign describes the deep preoccupations of an entire cohort. What is personal is its house and its aspects, and its transits, which last for years and are typically named afterwards as the periods in which a life divided into before and after.

What it governs: power and its uses, control, obsession, buried material of every kind, death and rebirth, sexuality in its transformative aspect, and whatever has been repressed and will eventually surface. Where Pluto falls describes where a person is most intense, where they encounter power, and where they will be remade at least once.

Its difficulty is that Pluto cannot be negotiated with, only survived. What it takes is not returned, and resistance to a Pluto transit tends to prolong rather than prevent it. But it is worth stating what the tradition holds alongside that: Pluto does not destroy indiscriminately. It removes what was already dead and was being carried anyway.

The pain of a Plutonic passage is real, and so is the fact that almost nobody, afterwards, wants the earlier version of themselves back.