Ahmad ibn Muhammad ibn Kathir al-Farghani

Ahmad ibn Muhammad ibn Kathir al-Farghani

Abū al-ʿAbbās Aḥmad ibn Muḥammad ibn Kathīr al-Farghānī (Arabic: أبو العبّاس أحمد بن محمد بن كثير الفرغاني) also known as Alfraganus in the West (c. 800 – 870), was an astronomer in the Abbasid court in Baghdad, and one of the most famous astronomers in the 9th century. Al-Farghani composed several works on astronomy and astronomical equipment that were widely distributed in Arabic and Latin and were influential to many scientists. His best known work, Kitāb fī Jawāmiʿ ʿIlm al-Nujūmi (whose name translates to Elements of astronomy on the celestial motions), was an extensive summary of Ptolemy's Almagest containing revised and more accurate experimental data. Read more on Wikipedia

Since 2007, the English Wikipedia page of Ahmad ibn Muhammad ibn Kathir al-Farghani has received more than 66,202 page views. His biography is available in 33 different languages on Wikipedia. Ahmad ibn Muhammad ibn Kathir al-Farghani is the 87th most popular astronomer (down from 79th in 2019), the 15th most popular biography from Uzbekistan (up from 18th in 2019) and the most popular Uzbekistani Astronomer.

Ahmad ibn Muhammad ibn Kathir al-Farghani is most famous for his discovery of the law of conservation of momentum, which states that in an isolated system, the total momentum of the system remains constant.