| The faces are one
            third of each sign, i.e., 10° of the zodiacal circle,
            beginning with the first point of Aries and
            continuing to the last point of Pisces. Each
            of the 36 resulting faces was said to be governed by a
            one of the five planets or
            either of the luminaries.
            Al-Bīrūnī, in
            his The Book of Instruction in the Elements of
            the Art of Astrology, provides an early
            codification of this scheme, identifying the lord of
            each face. On Islamic astrolabes, the list of faces is
            often labeled الوجوه (al- wujūh) and indicates the
            lords by the last letter of the governing planet or
            luminary. The
            lords of the faces are given in the table below. 
              
                | Zodiacal Sign | Lords of the Faces |  |  
                |  | 10° | 20° | 30° |  
                | Aries | المراخ Mars
 | الشمس Sun
 | الزهره Venus
 |  
                | Taurus | العطارد Mercury
 | القمر Moon
 | الوحل Saturn
 |  
                | Gemini | المشترى Jupiter
 | المراخ Mars
 | الشمس Sun
 |  
                | Cancer | الزهره Venus
 | العطارد Mercury
 | القمر Moon
 |  
                | Leo | الوحل Saturn
 | المشترى Jupiter
 | المراخ Mars
 |  
                | Virgo | الشمس Sun
 | الزهره Venus
 | العطارد Mercury
 |  
                | Libra | القمر Moon
 | الوحل Saturn
 | المشترى Jupiter
 |  
                | Scorpio | المراخ Mars
 | الشمس Sun
 | الزهره Venus
 |  
                | Sagittarius | العطارد Mercury
 | القمر Moon
 | الوحل Saturn
 |  
                | Capricorn | المشترى Jupiter
 | المراخ Mars
 | الشمس Sun
 |  
                | Aquarius | الزهره Venus
 | العطارد Mercury
 | القمر Moon
 |  
                | Pisces | الوحل Saturn
 | المشترى Jupiter
 | المراخ Mars
 |  |