What counts as a planet in astrology?

Anything that moves against the fixed stars, in the ancient sense of the word: the Sun and Moon (the luminaries), Mercury, Venus, Mars, Jupiter and Saturn (the classical planets), and Uranus, Neptune and Pluto (the modern ones). Astrology's usage predates the modern astronomical definition and was never revised to match it.

What does each planet mean in a chart?

In shortest form: the Sun is identity and vitality; the Moon feeling and habit; Mercury mind and speech; Venus love and value; Mars drive and anger; Jupiter growth and meaning; Saturn limit and structure; Uranus rupture and freedom; Neptune dream and dissolution; Pluto power and transformation. Each page unpacks its planet by sign, house and aspect.

What are benefics and malefics?

The traditional temperaments of the five classical planets: Jupiter and Venus are the greater and lesser benefics, associated with ease and increase; Saturn and Mars the greater and lesser malefics, associated with difficulty and conflict; Mercury is neutral. The scheme has Babylonian roots and remains in traditional practice, though modern astrology prefers to read Saturn and Mars as challenge rather than misfortune.

What are rulership and exaltation?

A planet rules the sign or signs where it is most at home, the Sun rules Leo, the Moon Cancer, and each classical planet a pair, and is exalted in one further sign where it acts with special strength, a scheme inherited from Babylon's 'secret places.' The opposite placements are called detriment and fall. Together these dignities describe where a planet works with the grain or against it.

Why do Uranus, Neptune and Pluto have meanings if the ancients never saw them?

Their meanings were read from the times of their discovery and from observation since: Uranus arrived with the revolutions of the late eighteenth century and means rupture and freedom; Neptune with anaesthesia, photography and spiritualism, and means dream and dissolution; Pluto with the atomic age, and means buried power and transformation. Traditional astrologers use them sparingly or not at all; modern practice treats them as generational as much as personal.

Is Pluto still a planet in astrology?

Yes. The 2006 astronomical reclassification changed a scientific category, not astrological practice, which had never depended on it; astrology's 'planet' has always meant a moving light with a distinct function. Charts cast today treat Pluto exactly as before, and its page explains what it is read to signify.

Why do the slow planets matter less for personality?

Because they move so slowly that everyone born within several years shares their sign. Uranus spends about seven years in a sign, Neptune fourteen, Pluto up to thirty, so their sign placements describe generations; what individualises them in a chart is their house and their aspects to the fast planets. The Moon, by contrast, changes sign in about two and a half days and is intensely personal.

Where do the planets' meanings originally come from?

From Babylon, in a documented line. The omen series Enuma Anu Enlil already read Venus for abundance and love, Mars for pestilence and war, Jupiter for kingship, meanings the Greeks inherited along with the zodiac and passed to every later tradition. The Babylonian pages of this compendium trace that ancestry tablet by tablet.

The building blocks

The planets

Astrology's moving parts. The signs are the stage; the planets are the actors: two luminaries, five wanderers the ancients could see, and three arrivals the telescope added. Each carries a god's name, a Babylonian omen ancestry, a sign it rules, a sign that exalts it, and a role in the chart, and each gets its own page here.

2: luminaries
5: classical planets
3: modern arrivals

The planets

In the traditional order of speed, luminaries first, then the wanderers from swiftest to slowest, then the three the telescope added.

☀️

The Sun

Luminary rules Leo

The centre in every sense: identity, vitality, purpose, the king of the chart as Shamash was judge of heaven and earth. Exalted in Aries, at home in Leo, and the body whose yearly road defines the zodiac itself.

🌙

The Moon

Luminary rules Cancer

The fastest mover and the deepest: feeling, memory, body, habit, the daily life beneath the biography. Sin came first in every Babylonian omen list, and the Moon still comes first in reading any chart's emotional weather. Exalted in Taurus.

☿

Mercury

Classical rules Gemini & Virgo

The messenger: mind, speech, trade, connection, the god Nabu of the scribes become Hermes of the roads. Never far from the Sun, fast, double-natured, and the only planet ruling and exalted in the same sign, Virgo.

♀

Venus

Classical rules Taurus & Libra

The lesser benefic: love, beauty, pleasure, value, Ishtar of the morning and evening star whose twenty-one-year Babylonian record is the oldest planetary diary on earth. Exalted in Pisces, and the brightest thing in the sky after the luminaries.

♂

Mars

Classical rules Aries & Scorpio

The lesser malefic: drive, courage, anger, the cut that separates. Nergal of plague and war to Babylon, Ares to Greece, and in a chart the engine of assertion, exalted in Capricorn where force learns discipline.

♃

Jupiter

Classical rules Sagittarius & Pisces

The greater benefic: growth, luck, meaning, generosity, Marduk the king of the gods whose presence in an eclipse could spare a Babylonian king. Exalted in Cancer, and everywhere the planet of more.

♄

Saturn

Classical rules Capricorn & Aquarius

The greater malefic and the great teacher: limit, time, structure, harvest, the outermost planet the ancients could see and the slowest. Exalted in Libra, feared in every tradition, and indispensable to all of them.

♅

Uranus

Modern found 1781

The first planet ever discovered, arriving with the American and French revolutions and named, fittingly, for the sky itself. Modern astrology reads it as rupture, invention, freedom and the lightning of the unexpected; moderns assign it Aquarius.

♆

Neptune

Modern found 1846

Found by mathematics before telescope, in the age of anaesthesia, photography and spiritualism, and read accordingly: dissolution, dream, glamour, compassion and fog. Moderns assign it Pisces, beside Jupiter's older claim.

♇

Pluto

Modern found 1930

Discovered in the decade of the atom's splitting and named for the lord of the underworld: power, death and rebirth, the buried made visible. Astronomy reclassified it; astrology kept it, assigned to Scorpio beside Mars.

What a planet is in astrology

In astrology's vocabulary, 'planet' keeps its ancient meaning: a wanderer, any light that moves against the fixed stars. That includes the Sun and Moon, the two luminaries, alongside Mercury, Venus, Mars, Jupiter and Saturn, the five wanderers every ancient culture tracked, and, since the telescope, Uranus, Neptune and Pluto. The planets are the chart's actors. Signs describe how, houses describe where, aspects describe the conversations between them, but the planets are the who: each one a concentrated function, will, feeling, mind, love, drive, growth, limit, that plays its role in every human story the chart is asked about.

Two luminaries, five wanderers, three arrivals

The library sorts naturally into three tiers. The luminaries, Sun and Moon, are the chart's poles: the conscious centre and the felt life, king and tide. The five classical planets, listed from swiftest to slowest, Mercury, Venus, Mars, Jupiter, Saturn, carry the working vocabulary every tradition shares, from Babylon through Greece to India. The three modern planets, Uranus, Neptune and Pluto, entered the system only after 1781, and their meanings were read off the eras of their discovery, revolution, dissolution, hidden power, a method that says something honest about how astrological meaning has always been made.

Gods behind the names

Every planet's name is the residue of a theology, and usually of two. Babylon assigned the planets to its great gods, Marduk took Jupiter, Ishtar Venus, Nergal Mars, Ninurta Saturn, Nabu Mercury, and read their omens accordingly, as the Enuma Anu Enlil pages of this compendium show in detail. Greece mapped its own pantheon onto the same lights, Rome translated the Greek, and the Roman names stuck. The meanings travelled with the gods: Venus has meant love and increase, and Mars war and fever, continuously since the omen series, which makes the planetary meanings the oldest living layer of astrology.

Rulership, exaltation, dignity

Each planet has signs where it is strong and placements where it labours. A planet rules its own signs, the scheme's elegant symmetry is described in the signs library, and is exalted in one other, the exaltations descending from Babylon's 'secret places' of the planets. Traditional astrology extends this into a full system of dignities and debilities: a planet opposite its own sign is in detriment, opposite its exaltation in fall. These are not moral verdicts but descriptions of ease, a planet in dignity acts with the grain, one in debility across it, and much of traditional chart judgement is the weighing of exactly this.

Benefics, malefics and the modern revision

The tradition sorted the five classical planets by temperament: Jupiter and Venus the greater and lesser benefics, bringers of ease; Saturn and Mars the greater and lesser malefics, bringers of difficulty; Mercury neutral, taking the colour of its company. The scheme is Babylonian in seed, Jupiter's presence could soften an eclipse omen, Mars meant trouble in the reports, and Hellenistic in system. Modern astrology softened the language, reading Saturn as structure and Mars as drive rather than as misfortune, but the underlying observation, that some functions comfort and some confront, has survived every rewording.

The speeds and the layers of a life

The planets' orbital speeds sort them into layers of experience, and astrology uses the sorting constantly. The Moon changes sign in days, and with the Sun, Mercury, Venus and Mars describes the personal: mood, mind, affection, effort. Jupiter and Saturn, taking twelve and twenty-nine years to round the zodiac, describe the social arc: growth and responsibility, opportunity and limit. Uranus, Neptune and Pluto, spending years in a single sign, mark generations more than individuals, which is why modern astrologers read them collectively as much as personally. A chart is these layers stacked: the fast planets say what a day feels like, the slow ones what an era demands.

How to use this library

Each card above opens one planet's page: its gods and omen ancestry, its rulerships and exaltation, its dignities, its meanings in the chart by sign, house and aspect, and its correspondences, day, metal, body part, carried down from the old cosmologies. The pages cross-reference the signs library, since a planet's homes are half its meaning, and the Babylonian pages, where the omen roots of every meaning lie tablet by tablet. The planets are part of the Tarot Academy compendium in all fifty-two languages.

Frequently asked questions

: Anything that moves against the fixed stars, in the ancient sense of the word: the Sun and Moon (the luminaries), Mercury, Venus, Mars, Jupiter and Saturn (the classical planets), and Uranus, Neptune and Pluto (the modern ones). Astrology's usage predates the modern astronomical definition and was never revised to match it.
: In shortest form: the Sun is identity and vitality; the Moon feeling and habit; Mercury mind and speech; Venus love and value; Mars drive and anger; Jupiter growth and meaning; Saturn limit and structure; Uranus rupture and freedom; Neptune dream and dissolution; Pluto power and transformation. Each page unpacks its planet by sign, house and aspect.
: The traditional temperaments of the five classical planets: Jupiter and Venus are the greater and lesser benefics, associated with ease and increase; Saturn and Mars the greater and lesser malefics, associated with difficulty and conflict; Mercury is neutral. The scheme has Babylonian roots and remains in traditional practice, though modern astrology prefers to read Saturn and Mars as challenge rather than misfortune.
: A planet rules the sign or signs where it is most at home, the Sun rules Leo, the Moon Cancer, and each classical planet a pair, and is exalted in one further sign where it acts with special strength, a scheme inherited from Babylon's 'secret places.' The opposite placements are called detriment and fall. Together these dignities describe where a planet works with the grain or against it.
: Their meanings were read from the times of their discovery and from observation since: Uranus arrived with the revolutions of the late eighteenth century and means rupture and freedom; Neptune with anaesthesia, photography and spiritualism, and means dream and dissolution; Pluto with the atomic age, and means buried power and transformation. Traditional astrologers use them sparingly or not at all; modern practice treats them as generational as much as personal.
: Yes. The 2006 astronomical reclassification changed a scientific category, not astrological practice, which had never depended on it; astrology's 'planet' has always meant a moving light with a distinct function. Charts cast today treat Pluto exactly as before, and its page explains what it is read to signify.
: Because they move so slowly that everyone born within several years shares their sign. Uranus spends about seven years in a sign, Neptune fourteen, Pluto up to thirty, so their sign placements describe generations; what individualises them in a chart is their house and their aspects to the fast planets. The Moon, by contrast, changes sign in about two and a half days and is intensely personal.
: From Babylon, in a documented line. The omen series Enuma Anu Enlil already read Venus for abundance and love, Mars for pestilence and war, Jupiter for kingship, meanings the Greeks inherited along with the zodiac and passed to every later tradition. The Babylonian pages of this compendium trace that ancestry tablet by tablet.

The astrology library

Latest Posts

Discover the ancient wisdom of tarot cards and unlock the mysteries of your spiritual journey. Our blog is your gateway to understanding the rich symbolism, meanings, and practical applications of tarot reading.