A 10th-century Persian astronomer sat in the city of Shiraz, comparing the star charts of Ptolemy with what his own eyes saw in the night sky. Al-Sufi’s Book of Fixed Stars (Kitāb Ṣuwar al-Kawākib al-Thābitah) remains the most complete medieval record of the 28 lunar mansions, the Arabic manāzil al-qamar that divided the moon’s monthly journey into fixed stations. What he produced was not merely a translation of Greek astronomy but a synthesis of three traditions: the indigenous star lore of the Bedouin, the mathematical precision of Ptolemy’s Almagest, and the practical needs of a civilization that timed its religious calendar by the crescent.
The moon passes through one mansion each night, and the system gave pre-modern observers a way to predict weather, navigate deserts, and align rituals without a calendar in hand.
What Are the 28 Lunar Mansions in the Arabic System?
The lunar mansions (manāzil al-qamar, singular manzil) are 28 fixed segments along the ecliptic, each roughly 12.8 degrees wide. The moon occupies one mansion per night, completing the cycle in a sidereal month of 27.3 days. The extra fraction explains why the system uses 28 stations rather than 27: the moon lingers in some mansions for two nights, and the count rounds up to keep the cycle aligned with observable phases.
Each mansion has a name drawn from the asterisms the Bedouin used for navigation and weather prediction. Al-Sufi did not invent these. He recorded them. His contribution was to fix their positions against Ptolemy’s coordinate system, resolving centuries of oral variation. The first mansion, Al-Sharaṭān (The Two Signs), marks the horns of Aries. The last, Al-Buṭayn (The Little Belly), closes the cycle at the end of Pisces.
The system served three distinct purposes: agricultural timing (when to plant and harvest), ritual observation (the beginning of Ramadan, the timing of the Hajj), and astrological divination (the mansion rising at birth shaped temperament and fortune).
How Al-Sufi Compiled the Book of Fixed Stars
Abd al-Rahman al-Sufi (903-986 CE) worked under the patronage of the Buyid dynasty in Shiraz, modern-day Iran. He had access to the Almagest in Arabic translation, the work of the Banu Musa brothers who had corrected Ptolemy’s star catalog, and the living oral tradition of Bedouin star knowledge that had survived the Islamic conquests.
The Book of Fixed Stars, completed around 964 CE, contains 48 constellation illustrations based on Ptolemy’s list, plus 28 lunar mansion diagrams. Each mansion page shows two images: one as seen from outside the celestial sphere (the classical Greek view) and one as seen from Earth (the practical observer’s view). This dual representation was unprecedented. Al-Sufi wanted the reader to recognize the stars both in the book and in the sky.
He also recorded the first known observation of the Andromeda Galaxy, calling it a “little cloud” near the mouth of the constellation al-Ḥūt (the Fish). He noted that the Large Magellanic Cloud was visible from southern Arabia but invisible from Baghdad. These were not theoretical claims. He had looked.
The 28 Mansions: Names, Stars, and Meanings
The mansions fall into four groups of seven, corresponding to the lunar phases. Each carries a name that describes the asterism:
The First Seven (New Moon):
- Al-Sharaṭān (The Two Signs) – β, γ Arietis
- Al-Buṭayn (The Little Belly) – δ, ε Arietis
- Al-Thurayyā (The Many Little Ones, the Pleiades) – M45
- Al-Dabarān (The Follower) – Aldebaran, α Tauri
- Al-Haqʿah (The White Spot) – λ, φ¹ Orionis
- Al-Hanʿah (The Brand) – γ, ξ Geminorum
- Al-Dhirāʿ (The Forearm) – α, β Geminorum
The Second Seven (Waxing Moon): 8. Al-Nathrah (The Gap) – M44, Praesepe 9. Al-Ṭarf (The Glance) – κ Cancri, λ Leonis 10. Al-Jabhah (The Forehead) – ζ, γ, η, α Leonis 11. Al-Zubrah (The Mane) – δ, θ Leonis 12. Al-Ṣarfah (The Turn) – β Leonis 13. Al-ʿAwwāʾ (The Barker) – β, γ, δ, ε Virginis 14. Al-Simāk (The Unarmed) – Spica, α Virginis
The Third Seven (Full Moon): 15. Al-Ghafr (The Covering) – ι, κ, λ Virginis 16. Al-Zubānā (The Claws) – α, β Librae 17. Al-Iklīl (The Crown) – π, σ, τ Scorpii 18. Al-Qalb (The Heart) – Antares, α Scorpii 19. Al-Shawlah (The Sting) – λ, κ, ι, ν Scorpii 20. Al-Naʿāʾim (The Ostriches) – σ, φ, τ, ζ Sagittarii 21. Al-Baldah (The Empty Space) – π, ο, ξ Sagittarii
The Fourth Seven (Waning Moon): 22. Saʿd al-Dhābiḥ (The Luck of the Slaughterer) – α, β Capricorni 23. Saʿd al-Bulʿ (The Luck of the Swallower) – μ, ε Aquarii 24. Saʿd al-Suʿūd (The Luck of Lucks) – β, ξ Aquarii 25. Saʿd al-Akhbiyah (The Luck of the Tents) – γ, ζ, η Aquarii 26. Al-Fargh al-Muqaddam (The Fore Spout) – α, β Pegasi 27. Al-Fargh al-Muʾakhkhar (The Hind Spout) – γ, δ Pegasi 28. Al-Buṭayn (The Little Belly) – β, γ Andromedae
Each name encodes a story. Al-Shawlah (The Sting) marks the tail of the scorpion. Al-Naʿāʾim (The Ostriches) refers to a Bedouin image of ostriches drinking from the Milky Way. The three Saʿd mansions (luck, fortune, tents) reflect the belief that certain stars brought rain and pasture.
The lunar mansions entered Islamic occult practice through two channels: the astrological tradition of the Sabians of Harran, who used the mansions for talismanic magic, and the folk astronomy of the Bedouin, who read omens from the rising and setting of specific stars.
Al-Sufi’s book became the standard reference for practitioners of ilm al-nujūm (the science of the stars), which included both mathematical astronomy and judicial astrology. A practitioner would note which mansion the moon occupied at the moment of a question, a birth, or the start of an enterprise. Each mansion carried specific qualities:
- Al-Thurayyā (the Pleiades) governed travel, trade, and the planting of trees.
- Al-Dabarān (Aldebaran) ruled over buildings, foundations, and long-term projects.
- Al-Qalb (Antares) governed matters of war, conflict, and surgery.
- Saʿd al-Suʿūd (the Luck of Lucks) was the most fortunate mansion, favorable for marriage, coronations, and contracts.
The talismanic tradition required the practitioner to cast a metal or wax image at the exact moment the moon entered a specific mansion, often with the corresponding planet in a favorable aspect. Al-Sufi did not write about this directly. His work was descriptive, not instructional. But his precise coordinates made the timing possible.
The lunar mansions had a practical religious function that predated Al-Sufi by centuries. The Quran (10:5) states that God “determined the mansions for the moon, that you might know the number of years and the reckoning.” The mansions were not astrology. They were sacred timekeeping.
The beginning of Ramadan was determined by the sighting of the new crescent, and the mansions provided a backup calculation when clouds obscured the moon. The timing of the Hajj, the pilgrimage to Mecca, also depended on the lunar calendar. A community that could track the mansions could predict the holy months without waiting for official sighting reports from Baghdad or Cairo.
The mansions also governed the agricultural calendar of the Arabian Peninsula. The rising of Al-Nathrah (the Beehive Cluster) in late May marked the beginning of the summer heat. The setting of Al-Thurayyā in late April signaled the end of the spring rains. Farmers who could read the stars knew when to irrigate and when to harvest.
The Book of Fixed Stars reached Europe through two routes: the Arabic-Latin translation movement of the 12th century, and the illustrated manuscripts that circulated in the Ottoman Empire. The Latin translation by Gerard of Cremona (1114-1187) introduced the lunar mansions to medieval European astrologers, who adapted them into the 28 mansions of the Hermetic tradition.
The Ottoman astronomer Taqi al-Din (1526-1585) cited Al-Sufi extensively in his own star catalog, and the Mughal emperor Shah Jahan commissioned a Persian translation in the 17th century. The illustrations in Al-Sufi’s manuscript became the standard for Islamic celestial cartography for six centuries.
What Al-Sufi preserved was not a single tradition but a convergence. The Bedouin star names, the Greek coordinate system, the Islamic religious calendar, and the Persian artistic tradition all met in his pages. The lunar mansions survived because they were useful to too many people to be abandoned.
The lunar mansions are often confused with the Chinese xiù (lunar lodges) or the Hindu nakshatras. The three systems share a common origin in the division of the moon’s path into 27 or 28 segments, but they diverged thousands of years ago. The Arabic mansions use different boundary stars, different names, and different symbolic associations. They are not interchangeable.
The mansions are also not the same as the zodiac signs. The zodiac divides the ecliptic into 12 equal segments of 30 degrees, aligned with the solar year. The mansions divide the same path into 28 unequal segments, aligned with the lunar month. A mansion covers roughly two and a half days of the moon’s motion, not one month.
And the mansions are not a predictive system in the modern horoscopic sense. They do not describe personality traits or predict future events through planetary aspects. They are a timing system. They tell you when to plant, when to travel, when to begin a project, and when to wait.
FAQ
What is the difference between lunar mansions and nakshatras? The nakshatras are the Hindu lunar stations, 27 in number, with different boundary stars and symbolic meanings. The Arabic mansions share the same astronomical principle but developed independently with Bedouin star lore and Islamic religious applications.
How many lunar mansions did Al-Sufi record? Al-Sufi recorded 28 mansions in the Book of Fixed Stars, each with its named stars, coordinates, and illustrations. His work fixed the positions that had previously been transmitted orally.
Can the lunar mansions still be used for timing today? Yes. The moon still passes through the same fixed stars. A modern practitioner can calculate the current mansion using an astronomical ephemeris or a digital planetarium and apply the traditional correspondences for planting, ritual timing, or divination.
Did Al-Sufi believe in astrological magic? Al-Sufi was primarily an astronomer and mathematician. His book records positions and observations, not magical instructions. But his work became the reference for practitioners of talismanic magic who needed precise celestial coordinates.
The lunar mansions of Al-Sufi are not a relic of a dead science. They are a working system that connects the observer to the sky through named stars and timed actions. The moon still passes through Al-Sharaṭān tonight, and tomorrow it will move to Al-Buṭayn. The cycle has not changed. What has changed is our willingness to look.
For a deeper understanding of how the mansions fit into the broader system of lunar timing, see our guide to the lunar mansions. The relationship between the mansions and the fixed stars is explored in our glossary of fixed star correspondences. And for the practical application of mansion timing in ritual work, read working with the 28 mansions.