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Shams Al-Dīn Abū Abd Allāh Al-Khalīlī
Shams al-Dīn Abū ʿAbd Allāh Muḥammad ibn Muḥammad al-Khalīlī (; 1320–1380) was a Mamluk-era Syrian astronomer who compiled astronomical tables. He worked for most of his life as a (a religious timekeeper) at the Umayyad Mosque in Damascus. Little is known about his life. Work Al-Khalili is known for two sets of mathematical tables he constructed, both totalling roughly 30,000 entries. He tabulated all the entries made by the celebrated Egyptian Muslim astronomer Ibn Yunus, except for the entries that al-Khalili made himself for the city of Damascus. He computed 13,000 entries into his 'Universal Tables' of different auxiliary functions which allowed him to generate the solutions of standard problems of spherical astronomy for any given latitude. In addition to this, he created a 3,000 entry table that gave the (the direction of the city of Mecca) for all latitudes and longitudes for all the Muslim countries of the 14th century. The values present in al-Khalili’s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qibla
The qibla () is the direction towards the Kaaba in the Great Mosque of Mecca, Sacred Mosque in Mecca, which is used by Muslims in various religious contexts, particularly the direction of prayer for the salah. In Islam, the Kaaba is believed to be a sacred site built by prophets Abraham in Islam, Abraham and Ishmael in Islam, Ishmael, and that its use as the qibla was ordained by God in several verses of the Quran revealed to Muhammad in the second Islamic calendar, Hijri year. Prior to this revelation, Muhammad and his followers in Medina faced Jerusalem for prayers. Most mosques contain a (a wall niche) that indicates the direction of the qibla. The qibla is also the direction for entering the (sacred state for the hajj pilgrimage); the direction to which animals are turned during (Islamic slaughter); the recommended direction to make (supplications); the direction to avoid when relieving oneself or spitting; and the direction to which the deceased are aligned when Islamic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Significant Figures
Significant figures, also referred to as significant digits, are specific digits within a number that is written in positional notation that carry both reliability and necessity in conveying a particular quantity. When presenting the outcome of a measurement (such as length, pressure, volume, or mass), if the number of digits exceeds what the measurement instrument can resolve, only the digits that are determined by the resolution are dependable and therefore considered significant. For instance, if a length measurement yields 114.8 mm, using a ruler with the smallest interval between marks at 1 mm, the first three digits (1, 1, and 4, representing 114 mm) are certain and constitute significant figures. Further, digits that are uncertain yet meaningful are also included in the significant figures. In this example, the last digit (8, contributing 0.8 mm) is likewise considered significant despite its uncertainty. Therefore, this measurement contains ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scholars From The Mamluk Sultanate
A scholar is a person who is a researcher or has expertise in an academic discipline. A scholar can also be an academic, who works as a professor, teacher, or researcher at a university. An academic usually holds an advanced degree or a terminal degree, such as a master's degree or a doctorate (PhD). Independent scholars and public intellectuals work outside the academy yet may publish in academic journals and participate in scholarly public discussion. Definitions In contemporary English usage, the term ''scholar'' sometimes is equivalent to the term ''academic'', and describes a university-educated individual who has achieved intellectual mastery of an academic discipline, as instructor and as researcher. Moreover, before the establishment of universities, the term ''scholar'' identified and described an intellectual person whose primary occupation was professional research. In 1847, minister Emanuel Vogel Gerhart spoke of the role of the scholar in society: Gerhart argued ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
14th-century Astrologers
The 14th century lasted from 1 January 1301 (represented by the Roman numerals MCCCI) to 31 December 1400 (MCD). It is estimated that the century witnessed the death of more than 45 million lives from political and natural disasters in both Europe and the Mongol Empire. West Africa experienced economic growth and prosperity. In Europe, the Black Death claimed 25 million lives wiping out one third of the European population while the Kingdom of England and the Kingdom of France fought in the protracted Hundred Years' War after the death of King Charles IV of France led to a claim to the French throne by King Edward III of England. This period is considered the height of chivalry and marks the beginning of strong separate identities for both England and France as well as the foundation of the Italian Renaissance and the Ottoman Empire. In Asia, Tamerlane (Timur), established the Timurid Empire, history's third largest empire to have been ever established by a single conqueror. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientists Who Worked On Qibla Determination
A scientist is a person who researches to advance knowledge in an area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophical study of nature called natural philosophy, a precursor of natural science. Though Thales ( 624–545 BC) was arguably the first scientist for describing how cosmic events may be seen as natural, not necessarily caused by gods,Frank N. Magill''The Ancient World: Dictionary of World Biography'', Volume 1 Routledge, 2003 it was not until the 19th century that the term ''scientist'' came into regular use after it was coined by the theologian, philosopher, and historian of science William Whewell in 1833. History The roles of "scientists", and their predecessors before the emergence of modern scientific disciplines, have evolved considerably over time. Scientists of different eras (and before them, natural philosophers, mathematicians, natur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medieval Syrian Mathematicians
In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of World history (field), global history. It began with the fall of the Western Roman Empire and transitioned into the Renaissance and the Age of Discovery. The Middle Ages is the middle period of the three traditional divisions of Western history: classical antiquity, the medieval period, and the modern period. The medieval period is itself subdivided into the Early Middle Ages, Early, High Middle Ages, High, and Late Middle Ages. Population decline, counterurbanisation, the collapse of centralised authority, invasions, and mass migrations of tribes, which had begun in late antiquity, continued into the Early Middle Ages. The large-scale movements of the Migration Period, including various Germanic peoples, formed new kingdoms in what remained of the Western Roman Empire. In the 7th century, North Africa and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medieval Syrian Astronomers
In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and transitioned into the Renaissance and the Age of Discovery. The Middle Ages is the middle period of the three traditional divisions of Western history: classical antiquity, the medieval period, and the modern period. The medieval period is itself subdivided into the Early Middle Ages, Early, High Middle Ages, High, and Late Middle Ages. Population decline, counterurbanisation, the collapse of centralised authority, invasions, and mass migrations of tribes, which had begun in late antiquity, continued into the Early Middle Ages. The large-scale movements of the Migration Period, including various Germanic peoples, formed new kingdoms in what remained of the Western Roman Empire. In the 7th century, North Africa and the Middle East—once par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Damascus
The term "the people" refers to the public or common mass of people of a polity. As such it is a concept of human rights law, international law as well as constitutional law, particularly used for claims of popular sovereignty. In contrast, a people is any plurality of persons considered as a whole. Used in politics and law, the term "a people" refers to the collective or community of an ethnic group or nation. Concepts Legal Chapter One, Article One of the Charter of the United Nations states that "peoples" have the right to self-determination. Though the mere status as peoples and the right to self-determination, as for example in the case of Indigenous peoples (''peoples'', as in all groups of indigenous people, not merely all indigenous persons as in ''indigenous people''), does not automatically provide for independent sovereignty and therefore secession. Indeed, judge Ivor Jennings identified the inherent problems in the right of "peoples" to self-determination, as i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1380 Deaths
Year 1380 ( MCCCLXXX) was a leap year starting on Sunday of the Julian calendar. Events January–December * February – Olaf II of Denmark also becomes Olaf IV of Norway, with his mother Margrete (Margaret) as regent. Iceland and the Faroe Islands, as parts of Norway, pass under the Danish crown. * March 13 – The southern England town of Winchelsea in East Sussex is attacked and burned by an expeditionary force from France for a second time."Fires, Great", in ''The Insurance Cyclopeadia: Being an Historical Treasury of Events and Circumstances Connected with the Origin and Progress of Insurance'', Cornelius Walford, ed. (C. and E. Layton, 1876) p27 * May 31 – Grand Duke of Lithuania Jogaila signs the secret Treaty of Dovydiškės, with the Teutonic Knights. This sparks a civil war with his uncle Kęstutis. * June 21 – Battle of Chioggia: the Venetian fleet defeats the Genoese. * July 27 – Henry Bolingbroke marries Mary de Bohun at Arundel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1320 Births
Year 1320 ( MCCCXX) was a leap year starting on Tuesday of the Julian calendar. Events January – March * January 5 – Henry III, Count of Gorizia, arrives in Padua as the Imperial Vicar with a large army, promising protection to the Italian city state. * January 20 – Duke Władysław I Łokietek ("Ladislaus the Short") becomes king of a reunited Poland, after receiving the approval from Pope John XXII. He is crowned, along with his wife Jadwiga of Kalisz, at the royal cathedral on Wawel Hill at Kraków. Wladysław's kingdom is surrounded by three hostile neighbors: Brandenburg, the Teutonic Order and Bohemia. Looking for allies, he makes an alliance with Charles I, ruler of Hungary. * February 15 – Pope John XXII grants a mandate to the Archbishop of York, William Melton, to order restitution of confiscated Knights Templar property in England to the Knights Hospitaller. * February 18 – Walter de Stapledon, Bishop of Exeter, becomes the new Lord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of St Andrews
The University of St Andrews (, ; abbreviated as St And in post-nominals) is a public university in St Andrews, Scotland. It is the List of oldest universities in continuous operation, oldest of the four ancient universities of Scotland and, following the universities of University of Oxford, Oxford and University of Cambridge, Cambridge, the third-oldest university in the English-speaking world. St Andrews was founded in 1413 when the Avignon Pope, Avignon Antipope Benedict XIII issued a papal bull to a small founding group of Augustinians, Augustinian clergy. Along with the universities of University of Glasgow, Glasgow, University of Aberdeen, Aberdeen, and University of Edinburgh, Edinburgh, St Andrews was part of the Scottish Enlightenment during the 18th century. St Andrews is made up of a variety of institutions, comprising three colleges — United College, St Andrews, United College (a union of St Salvator's and St Leonard's Colleges), St Mary's College, St Andrew ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
