A medieval astrologer once drew the twenty-eighth lunar mansion as a set of scales hanging from the moon itself. The image was not poetry. It was a working diagram.
Al Wazn (Arabic: الوزن, “the Balance”) is the twenty-third lunar mansion, a star grouping that Arabic, Indian and Western astrologers have used for over a thousand years to time everything from marriage contracts to the cutting of timber. It sits in the constellation Libra, the Scales, and its traditional associations are justice, equilibrium and the careful weighing of outcomes.
What is Al Wazn in the lunar mansions?
The lunar mansions are a division of the moon’s monthly path into twenty-eight stations, each marked by a specific star or asterism. Al Wazn is the twenty-third of these stations, located in Libra, and it carries the same symbolic weight as the constellation that hosts it: balance, judgment and measured action.
In the Arabic system, which is the oldest surviving complete list of the mansions, Al Wazn is known by several names. The most common is Al Wazn, meaning “the Weight” or “the Balance.” Some medieval texts call it Al Zubana, a name it shares with the claws of Scorpio, which once extended into what is now Libra. The confusion between these two names has persisted for centuries, and we will return to it.
The mansion’s position is fixed by the stars that mark it. Al Wazn is associated with the bright stars of Libra, primarily Zubenelgenubi (Alpha Librae) and Zubeneschamali (Beta Librae). These two stars, whose names derive from the Arabic al-zubānā, “the claws,” were once the southern and northern claws of the Scorpion before the Romans carved out a separate constellation for the Scales.
Where does the name Al Wazn come from?
The name comes from classical Arabic astronomy, which organized the night sky into manāzil al-qamar, the “stations of the moon.” This system predates Islam and was absorbed into Islamic astronomical and astrological practice, where it appears in the Qur’an itself: “And the moon, We have decreed for it mansions, until it returns like an old date stalk” (Surah Ya-Sin 36:39).
The Arabic word wazn means “weight” or “measure.” It is the same root that gives us mīzān, the balance, which appears in Islamic eschatology as the scale on which deeds are weighed on the Day of Judgment. The mansion’s name is therefore not merely descriptive of a star pattern. It carries a moral charge that would have been obvious to any Arabic-speaking astrologer of the ninth century.
The earliest complete list of the mansions in Arabic is attributed to the astronomer Abu Ma’shar al-Balkhi (787–886 CE), whose Kitab al-madkhal al-kabir (“The Great Introduction to Astrology”) was translated into Latin in the twelfth century and became one of the most influential astrological texts in medieval Europe. Abu Ma’shar lists Al Wazn as the twenty-third mansion and assigns it a specific set of influences, which we will examine shortly.
What does Al Wazn mean in astrology?
The mansion’s meaning flows directly from its name and its stars. Al Wazn is the mansion of weighing, of measuring one thing against another, and of the consequences that follow from that measurement.
In the Arabic tradition, each mansion has both a beneficial and a harmful face. Al Wazn is no exception. The medieval astrologer Al-Biruni (973–1048 CE), in his Book of Instruction in the Elements of the Art of Astrology, describes Al Wazn as favorable for transactions involving measurement, for the recovery of lost goods, and for the establishment of contracts. It is, in his words, a mansion that “preserves what is placed in it.”
But the same mansion, when the moon is afflicted, turns toward litigation, disputes over property, and the exposure of hidden faults. The balance cuts both ways. It weighs the just and the unjust with the same beam.
Indian astrology, which inherited the mansions through the nakshatra system, does not have a direct equivalent to Al Wazn. The Indian system divides the zodiac into twenty-seven lunar stations rather than twenty-eight, and its Libra mansions are Chitra (Spica) and Swati (Arcturus). The Arabic system, by contrast, kept twenty-eight mansions to match the moon’s sidereal period of approximately 27.3 days, with the extra station accounting for the moon’s daily motion.
How was Al Wazn used in practice?
The mansions were not abstract symbols. They were a working calendar, a tool for timing actions in the world. Al Wazn, with its emphasis on balance and measurement, governed a specific set of activities.
Medieval Arabic astrologers recommended Al Wazn for:
- The signing of contracts and treaties
- The weighing and selling of goods
- The recovery of stolen or lost property
- The establishment of boundaries and the settling of disputes
- The beginning of a journey with a clear destination
The same sources warned against using Al Wazn for anything that required speed or secrecy. The balance is slow. It deliberates. A venture begun under Al Wazn would proceed with caution, and it would be judged by its outcome rather than its intentions.
In the Western tradition, the mansions were absorbed into the grimoire literature of the Renaissance. The Picatrix, a twelfth-century Arabic text translated into Latin at the court of Alfonso X of Castile, assigns each mansion a set of magical operations. For Al Wazn, the Picatrix recommends the carving of images for “the separation of lovers” and for “the destruction of a place.” This is the darker face of the balance, the weighing that ends in a verdict.
The English astrologer William Lilly (1602–1681), whose Christian Astrology remains the standard reference for traditional Western astrology, does not use the mansions directly. But his contemporary Robert Fludd (1574–1637) included them in his cosmological diagrams, placing Al Wazn among the “celestial signs” that governed the sublunar world.
How does Al Wazn compare to the other mansions?
Al Wazn sits at a turning point in the lunar cycle. The twenty-eighth mansions are divided into four groups of seven, each associated with one of the four elements. Al Wazn, as the twenty-third mansion, falls in the third group, which is associated with fire.
This placement matters. The mansions of the third group are the “fiery” mansions, and they are traditionally the most dangerous. They are the mansions of sudden change, of conflict, of the breaking of old forms. Al Wazn, however, is the exception. It is the balance within the fire, the cool weighing that happens in the midst of heat.
The mansion that precedes Al Wazn is Al Sa’d al-Dhabih (“the Lucky One of the Sacrifice”), the twenty-second mansion, associated with the star Vega. The mansion that follows it is Al Akrab (“the Scorpion”), the twenty-fourth, associated with the stars of Scorpio. The sequence is telling: sacrifice, then balance, then the sting. The moon passes through the offering, pauses at the scales, and then enters the dangerous territory of the Scorpion.
In the Western zodiac, Al Wazn corresponds to the second decan of Libra, the portion of the sign ruled by Venus. This decan is associated with the Tarot card Justice, which is itself a weighing. The correspondence is not accidental. The mansions and the decans both derive from the same ancient division of the zodiac, and both preserve the image of the balance.
What do people get wrong about Al Wazn?
The most common error is the confusion between Al Wazn and Al Zubana. As we noted earlier, the two names refer to the same region of the sky but to different asterisms. Al Zubana is the older name, referring to the claws of Scorpio. Al Wazn is the newer name, referring to the scales of Libra. Medieval texts sometimes use the names interchangeably, and modern sources often repeat the confusion.
The distinction matters for practical astrology. The claws of the Scorpion and the scales of the Balance are not the same symbol, and they do not carry the same meaning. The claws grasp. The scales weigh. An astrologer who uses one name when the other is intended will read the mansion incorrectly.
A second error is the assumption that the mansions are purely Arabic. The system is older than Islam. The twenty-eight mansions appear in Indian, Chinese and Babylonian astronomy, and the Arabic system likely inherited them from earlier sources. The names we use today are Arabic because the Arabic texts survived, but the system itself is a shared inheritance of the ancient world.
A third error is the belief that the mansions are deterministic. Al Wazn does not force a specific outcome. It describes a quality of time, a flavor of the moment. The astrologer who works with the mansions reads that quality and advises accordingly. The balance does not decide. It reveals.
FAQ
Is Al Wazn the same as Zubenelgenubi? Not exactly. Zubenelgenubi (Alpha Librae) is the brightest star associated with Al Wazn, but the mansion includes a wider region of the sky. The star is the marker, not the mansion itself.
What is the difference between the lunar mansions and the zodiac signs? The lunar mansions divide the moon’s monthly path into twenty-eight stations, while the zodiac signs divide the sun’s yearly path into twelve sections. The mansions are a lunar system, the signs a solar one.
Can I use Al Wazn in modern astrological practice? Yes. The mansions are still used in traditional and horary astrology, and many practitioners incorporate them into electional work, choosing favorable times for specific actions.
Why are there twenty-eight mansions instead of twenty-seven? The moon takes approximately 27.3 days to return to the same star, but the Arabic system uses twenty-eight mansions to account for the moon’s daily motion and to create a complete cycle. The Indian system uses twenty-seven.
The balance is not a decoration on the celestial map. It is a working tool, a way of reading time itself. When the moon passes through Al Wazn, the sky asks a question: what is being weighed, and which side will tip?
For those who work with the mansions, the answer is found in the stars themselves. Explore the full lunar mansions guide to see how Al Wazn fits into the complete cycle of the moon’s stations. For the symbolism of the balance in other traditions, see our glossary entry on Libra. And for the neighboring mansions that frame Al Wazn, read our guide to the fiery mansions.