Sāliḥ Muḥammad ʿUjayrī (1920–2022)
Sāliḥ Muḥammad ʿUjayrī (1920–2022) was a titan of Arab science, a polymath who bridged the gap between ancient observational astronomy and modern mathematical calculation. Known affectionately as the "Father of Astronomy" in the Persian Gulf, his life spanned over a century, during which he transformed how the region understands time, the lunar cycle, and the intersection of Islamic tradition with celestial mechanics.
1. Biography: A Century of Discovery
Born on June 23, 1920, in the Mirqab district of Kuwait City, Sāliḥ Muḥammad ʿUjayrī’s journey began in a pre-industrial Kuwait. His father, a teacher, sent him to the desert as a child to live with the Al-Rashaida tribe—a move intended to "toughen him up" and teach him the ways of the Bedouin. It was here, under the unpolluted canopy of the desert sky, that ʿUjayrī developed a lifelong fascination with the stars.
Education and Career Trajectory:
- Early Schooling: He attended the Mubarakiya School, one of Kuwait’s first modern educational institutions.
- The Egyptian Influence: In the 1940s, ʿUjayrī traveled to Egypt, then the intellectual heart of the Arab world. He sought out the most prominent astronomers of the era, eventually studying under the tutelage of Professor Al-Mursi Ahmad at King Fuad I University (now Cairo University).
- Formal Certification: In 1946, he was awarded a specialized certificate in astronomy from the Egyptian Union of Astronomers, followed by an honorary doctorate decades later, cementing his status as a formal scholar despite his largely self-taught beginnings.
- Professional Path: While he worked for a time in the Kuwaiti civil service and the banking sector to support his family, his "true" career was the establishment of the Al-Ujairi Observatory. In 1980, with the support of the Kuwait Foundation for the Advancement of Sciences (KFAS), he opened a major observatory that became a hub for regional research.
2. Major Contributions: The Mathematics of Time
ʿUjayrī’s primary contribution was the modernization of the Hijri (Lunar) Calendar. Before his intervention, lunar sightings in the Gulf were often inconsistent, relying on local reports that frequently conflicted.
- Algorithmic Calendars: ʿUjayrī developed a sophisticated mathematical methodology for predicting the "visibility of the crescent" (Hilal). He combined spherical trigonometry with historical observational data to create a calendar that could predict the start of Islamic months with remarkable precision years in advance.
- The Al-Ujairi Calendar: First published in 1944, this calendar became the official standard for Kuwait. It provides not only prayer times but also meteorological predictions, zodiacal shifts, and agricultural cycles.
- Instrument Design: He was adept at using and calibrating the astrolabe and the quadrant, but he also developed his own "Ujairi Circular Slide Rule"—a manual calculating device used to determine prayer times across different latitudes.
3. Notable Publications
ʿUjayrī was a prolific author, writing books that served both the academic community and the general public. His works often simplified complex celestial mechanics into accessible Arabic prose.
- Al-Taqwim al-Hijri (The Hijri Calendar, 1946): His seminal work explaining the mathematical basis for the lunar year.
- Kayfa Tahsib Hawadeth al-Kusuf wal-Khusuf (How to Calculate Solar and Lunar Eclipses): A technical manual for predicting celestial alignments.
- Al-Manakh (The Almanac): An annual publication that has been a staple in Kuwaiti households for over 70 years.
- Atlas al-Kawn (Atlas of the Universe): A comprehensive visual and mathematical guide to the solar system and beyond.
4. Awards & Recognition
Over his 101-year life, ʿUjayrī received nearly every major honor available to a scholar in the Middle East:
- Honorary Doctorate from Kuwait University (2005): The first honorary degree ever awarded by the institution.
- The State Merit Award (Kuwait): For his services to science and education.
- The Order of Kuwait (First Class): Awarded by the Amir of Kuwait.
- GCC Excellence Award: Recognizing his role as the premier astronomer of the Gulf Cooperation Council.
- Naming of the Al-Ujairi Center: A dedicated scientific center in Kuwait continues his research today.
5. Impact & Legacy: A Scientific Bridge
ʿUjayrī’s legacy is defined by his ability to harmonize religion and science. In a region where the start of Ramadan and Eid is of immense social and spiritual importance, his mathematical rigor provided a "scientific anchor" for religious authorities.
He transitioned Kuwaiti society from a reliance on folklore and simple observation to a reliance on astronomical calculation. Today, the Al-Ujairi Observatory remains a vital part of the Kuwait Science Club, and his methods continue to be taught to young astronomers across the Arab world. He is credited with inspiring the "Space Age" generation in Kuwait, leading to the eventual launch of Kuwaiti satellites (like KuwaitSat-1).
6. Collaborations
ʿUjayrī was not an isolated academic; he was a master of institutional collaboration.
- KFAS (Kuwait Foundation for the Advancement of Sciences): He worked closely with KFAS to secure funding for high-tech telescopes and digital tracking systems.
- Regional Astronomers: He maintained a lifelong correspondence with the Egyptian Astronomical Society and collaborated with Saudi and Iraqi scholars to unify the Hijri calendars of the Arabian Peninsula.
- Mentorship: In his later years, he mentored Dr. Saleh Al-Shiraqi and other contemporary Kuwaiti scientists, ensuring that his observatory would remain functional long after his passing.
7. Lesser-Known Facts
- The Comedian-Scholar: In his youth, ʿUjayrī was a talented stage actor and one of the pioneers of theater in Kuwait. He often used humor and performance to explain scientific concepts to the public, making him a beloved media personality.
- Fear of the Sky: Ironically, his interest in astronomy began with a profound fear of thunder and lightning. His father sent him to the desert to "face his fears," and he found that understanding the mechanics of the atmosphere and the stars turned his fear into fascination.
- The 1990 Invasion: During the Iraqi invasion of Kuwait, ʿUjayrī’s observatory was looted and damaged. Despite the personal and professional heartbreak, he immediately began rebuilding in 1991, viewing the restoration of the calendar as a vital part of restoring Kuwaiti national identity.
- Longevity and Tech: He lived long enough to transition from calculating planetary orbits with a pencil and paper to using supercomputers, yet he reportedly always kept a manual backup of his calculations to "ensure the machine hadn't lost its way."
Sāliḥ Muḥammad ʿUjayrī passed away on February 10, 2022, at the age of 101. He remains a symbol of the "Golden Age" of modern Arab science—a man who looked at the same stars as his Bedouin ancestors but saw within them the precise, beautiful language of mathematics.