Community hub
Recent from talks
Contribute something to knowledge base
Content stats: 0 posts, 0 articles, 0 media, 0 notes
Members stats: 0 subscribers, 0 contributors, 0 moderators, 0 supporters
Subscribers
Supporters
Contributors
Moderators
Hub AI
Al-Ashraf Umar II AI simulator
(@Al-Ashraf Umar II_simulator)
Hub AI
Al-Ashraf Umar II AI simulator
(@Al-Ashraf Umar II_simulator)
Al-Ashraf Umar II
Al-Malik Al-Ashraf (Mumahhid Al-Din) Umar Ibn Yūsuf Ibn Umar Ibn Alī Ibn Rasul (Arabic: عمر بن يوسف بن عمر بن علي بن رسول الغساني), known as Umar Ibn Yusuf (c. 1242 – 1296) was the third Rasulid sultan, who ruled as Al-Ashraf Umar II. He was also a mathematician, astronomer and physician.
Few biographical details about Al‑Malik al‑Ashraf ‘Umar are known. He was born in 1242 in Yemen, and he died in 1296. He excelled in astronomy, agriculture, veterinary science and medicine.
Al‑Ashraf ruled for as the third Rasulid sultan for 21 months from 1295, succeeding after the end of the 46-year rule of his father, Al-Muzaffar Yusuf I. According to the historian David King. In 1266 he commanded a military raid on the Yemenese city of Hajjah. He was made governor of al‑Mahjam. He was in charge of the highland city of Sanaa, now the capital of Yemen. For a period al‑Ashraf ruled as governor of the flood‑irrigated lands near al‑Mahjam, which was owned by his family.
Al‑Ashraf had six adult sons. Two of his daughters married sons of his younger brother and successor, al-Mu'ayyad Da'ud.
Data from the Encyclopaedia of Islam (1986)
Al-Ashraf wrote the first description of the use of a magnetic compass for determining the qibla. His works on astronomy contain information on earlier sources.
In a treatise about astrolabes and sundials, al-Ashraf included information on the construction of a compass bowl (ṭāsa). He then uses the compass to determine the north point, the meridian (khaṭṭ niṣf al-nahār), and the qibla towards Mecca. This is the first mention of a compass in a medieval Islamic scientific text and its earliest known use as a qibla indicator, although al-Ashraf did not claim to be the first to use it for this purpose.
Al‑Ashraf astronomical treatise includes the names of local Yemeni star names.
Al-Ashraf Umar II
Al-Malik Al-Ashraf (Mumahhid Al-Din) Umar Ibn Yūsuf Ibn Umar Ibn Alī Ibn Rasul (Arabic: عمر بن يوسف بن عمر بن علي بن رسول الغساني), known as Umar Ibn Yusuf (c. 1242 – 1296) was the third Rasulid sultan, who ruled as Al-Ashraf Umar II. He was also a mathematician, astronomer and physician.
Few biographical details about Al‑Malik al‑Ashraf ‘Umar are known. He was born in 1242 in Yemen, and he died in 1296. He excelled in astronomy, agriculture, veterinary science and medicine.
Al‑Ashraf ruled for as the third Rasulid sultan for 21 months from 1295, succeeding after the end of the 46-year rule of his father, Al-Muzaffar Yusuf I. According to the historian David King. In 1266 he commanded a military raid on the Yemenese city of Hajjah. He was made governor of al‑Mahjam. He was in charge of the highland city of Sanaa, now the capital of Yemen. For a period al‑Ashraf ruled as governor of the flood‑irrigated lands near al‑Mahjam, which was owned by his family.
Al‑Ashraf had six adult sons. Two of his daughters married sons of his younger brother and successor, al-Mu'ayyad Da'ud.
Data from the Encyclopaedia of Islam (1986)
Al-Ashraf wrote the first description of the use of a magnetic compass for determining the qibla. His works on astronomy contain information on earlier sources.
In a treatise about astrolabes and sundials, al-Ashraf included information on the construction of a compass bowl (ṭāsa). He then uses the compass to determine the north point, the meridian (khaṭṭ niṣf al-nahār), and the qibla towards Mecca. This is the first mention of a compass in a medieval Islamic scientific text and its earliest known use as a qibla indicator, although al-Ashraf did not claim to be the first to use it for this purpose.
Al‑Ashraf astronomical treatise includes the names of local Yemeni star names.