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The compass in the Four Great Inventions was formerly the compass of ancient China. It is a kind of direction-indicating tool, which is widely used in navigation, field exploration and other fields. In ancient times, it had a profound influence on trade, war and cultural exchange.
Abū ʿAbd Allāh Muḥammad ibn Jābir ibn Sinān al-Raqqī al-Ḥarrānī aṣ-Ṣābiʾ al-Battānī [n 1] (Arabic: محمد بن جابر بن سنان البتاني), usually called al-Battānī, a name that was in the past Latinized as Albategnius, [n 2] (before 858 – 929) was an astronomer, astrologer, geographer and mathematician, who lived and worked for most of his life at Raqqa ...
Song dynasty figurine of a man holding a compass. The compass is a magnetometer used for navigation and orientation that shows direction in regards to the geographic cardinal points. The structure of a compass consists of the compass rose, which displays the four main directions on it: East (E), South (S), West (W) and North (N). The angle ...
Mimar Sinan (Ottoman Turkish: معمار سينان, romanized: Mi'mâr Sinân; Turkish: Mimar Sinan, pronounced [miːˈmaːɾ siˈnan]; c. 1488/1490 – 17 July 1588) also known as Koca Mi'mâr Sinân Âğâ, ("Sinan Agha the Grand Architect" or "Grand Sinan") was the chief Ottoman architect, engineer and mathematician for sultans Suleiman the Magnificent, Selim II and Murad III.
Engraving of al-Qūhī's perfect compass to draw conic sections. Al-Qūhī was the leader of the astronomers working in 988 AD at the observatory built by the Buwayhid amir Sharaf al-Dawla in Badhdad. He wrote a treatise on the astrolabe in which he solves a number of difficult geometric problems.
Abū Muḥammad Jābir ibn Aflaḥ (Arabic: أبو محمد جابر بن أفلح, Latin: Geber/Gebir; 1100–1150) was an Arab [1] [2] Muslim astronomer and mathematician from Seville, who was active in 12th century al-Andalus.
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Habash Hasib made astronomical observations from 825 to 835, and compiled three zijes (astronomical tables): the first were still in the Hindu manner; the second, called the 'tested" tables, were the most important; they are likely identical with the "Ma'munic" or "Arabic" tables and may be a collective work of al-Ma'mun's astronomers; the third, called tables of the Shah, were smaller.