Biography of Scientist Al-Battani.

Muhammad ibn Jābir al-Ḥarrānī al-Battānī, commonly known as Al-Battani or Albategnius, was a highly influential Arab astronomer and mathematician who lived during the Islamic Golden Age. His contributions to astronomy, mathematics, and trigonometry had a profound impact on the development of these fields. Here is a detailed biography of Al-Battani:

Early Life (c. 858 – c. 929):

1. Birth: Al-Battani was born around 858 in Harran, a city in Upper Mesopotamia, which was then part of the Islamic Abbasid Caliphate. Harran was known for its ancient astronomical traditions.
2. Educational Background: He received his early education in the city of Harran, which had a rich intellectual and scientific atmosphere. Al-Battani’s interest in astronomy and mathematics was likely fostered during his formative years.

Contributions to Astronomy (9th – 10th Century):

1. Observations: Al-Battani became renowned for his precise and extensive astronomical observations. He made detailed observations of the Sun, Moon, stars, and planets, contributing to a better understanding of their positions and movements.
2. Solar Inclination: One of Al-Battani’s significant contributions was the determination of the solar inclination, i.e., the tilt of the Earth’s axis with respect to its orbit around the Sun. His calculated value was remarkably accurate and close to the modern value.
3. “Al-Zīj al-Sābī”: Al-Battani’s most notable work was the astronomical handbook known as “Al-Zīj al-Sābī” or “The Sābi Tables.” This work included a compilation of astronomical tables, observations, and calculations. It became a standard reference in astronomy for centuries.
4. Correction of Ptolemaic System: Al-Battani critically examined and corrected the Ptolemaic system, providing more accurate positions for celestial bodies. His revisions contributed to the advancement of the understanding of planetary motion.

Contributions to Mathematics and Trigonometry:

1. Trigonometric Advancements: Al-Battani made significant contributions to trigonometry, developing new methods and improving existing ones. He introduced the tangent function and compiled extensive tables of trigonometric values, particularly for tangent and cotangent.
2. Spherical Trigonometry: In his book “De scientia stellarum” (On the Science of Stars), he advanced the field of spherical trigonometry, providing detailed explanations and calculations for various astronomical phenomena.

Later Life and Legacy (10th Century):

1. Later Years: Al-Battani spent much of his life in Harran and later in Raqqa, continuing his observations and scholarly pursuits. His contributions significantly influenced the scientific knowledge of his time.
2. Name Variation: Al-Battani’s name is sometimes Latinized as Albategnius or Albatenius in historical texts.
3. Legacy: Al-Battani’s works were translated into Latin and served as essential references for European astronomers during the medieval and Renaissance periods. His observations and calculations laid the groundwork for later advancements in astronomy.

Death:

1. Date: The exact date of Al-Battani’s death is uncertain, but it is generally believed to be around 929.

Al-Battani’s life represents a crucial period in the history of Islamic science, where scholars like him played a vital role in preserving and advancing knowledge. His contributions to astronomy and mathematics continued to influence scholars for centuries, and his legacy remains an integral part of the history of scientific inquiry.