HOME

TheInfoList



OR:

Abu Rayhan Muhammad ibn Ahmad al-Biruni (973 – after 1050) commonly known as al-Biruni, was a
Khwarazm Khwarazm (; Old Persian: ''Hwârazmiya''; fa, خوارزم, ''Xwârazm'' or ''Xârazm'') or Chorasmia () is a large oasis region on the Amu Darya river delta in western Central Asia, bordered on the north by the (former) Aral Sea, on the ea ...
ian
Iranian Iranian may refer to: * Iran, a sovereign state * Iranian peoples, the speakers of the Iranian languages. The term Iranic peoples is also used for this term to distinguish the pan ethnic term from Iranian, used for the people of Iran * Iranian lan ...
in scholar and
polymath A polymath ( el, πολυμαθής, , "having learned much"; la, homo universalis, "universal human") is an individual whose knowledge spans a substantial number of subjects, known to draw on complex bodies of knowledge to solve specific pro ...
during the
Islamic Golden Age The Islamic Golden Age was a period of cultural, economic, and scientific flourishing in the history of Islam, traditionally dated from the 8th century to the 14th century. This period is traditionally understood to have begun during the reign ...
. He has been called variously the "founder of
Indology Indology, also known as South Asian studies, is the academic study of the history and cultures, languages, and literature of the Indian subcontinent, and as such is a subset of Asian studies. The term ''Indology'' (in German, ''Indologie'') i ...
", "Father of
Comparative Religion Comparative religion is the branch of the study of religions with the systematic comparison of the doctrines and practices, themes and impacts (including migration) of the world's religions. In general the comparative study of religion yie ...
", "Father of modern
geodesy Geodesy ( ) is the Earth science of accurately measuring and understanding Earth's figure (geometric shape and size), orientation in space, and gravity. The field also incorporates studies of how these properties change over time and equival ...
", and the first
anthropologist An anthropologist is a person engaged in the practice of anthropology. Anthropology is the study of aspects of humans within past and present societies. Social anthropology, cultural anthropology and philosophical anthropology study the norms an ...
. Al-Biruni was well versed in
physics Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which ...
, mathematics,
astronomy Astronomy () is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, g ...
, and
natural science Natural science is one of the branches of science concerned with the description, understanding and prediction of natural phenomena, based on empirical evidence from observation and experimentation. Mechanisms such as peer review and repeatab ...
s, and also distinguished himself as a historian,
chronologist Chronology (from Latin ''chronologia'', from Ancient Greek , ''chrónos'', "time"; and , ''-logia'') is the science of arranging events in their order of occurrence in time. Consider, for example, the use of a timeline or sequence of events. I ...
, and
linguist Linguistics is the scientific study of human language. It is called a scientific study because it entails a comprehensive, systematic, objective, and precise analysis of all aspects of language, particularly its nature and structure. Lingu ...
. He studied almost all the sciences of his day and was rewarded abundantly for his tireless research in many fields of knowledge. Royalty and other powerful elements in society funded Al-Biruni's research and sought him out with specific projects in mind. Influential in his own right, Al-Biruni was himself influenced by the scholars of other nations, such as the Greeks, from whom he took inspiration when he turned to the study of philosophy. A gifted linguist, he was conversant in Khwarezmian, Persian, Arabic,
Sanskrit Sanskrit (; attributively , ; nominally , , ) is a classical language belonging to the Indo-Aryan languages, Indo-Aryan branch of the Indo-European languages. It arose in South Asia after its predecessor languages had Trans-cultural diffusion ...
, and also knew
Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...
,
Hebrew Hebrew (; ; ) is a Northwest Semitic language of the Afroasiatic language family. Historically, it is one of the spoken languages of the Israelites and their longest-surviving descendants, the Jews and Samaritans. It was largely preserved ...
, and Syriac. He spent much of his life in
Ghazni Ghazni ( prs, غزنی, ps, غزني), historically known as Ghaznain () or Ghazna (), also transliterated as Ghuznee, and anciently known as Alexandria in Opiana ( gr, Αλεξάνδρεια Ωπιανή), is a city in southeastern Afghanistan ...
, then capital of the
Ghaznavids The Ghaznavid dynasty ( fa, غزنویان ''Ġaznaviyān'') was a culturally Persianate, Sunni Muslim dynasty of Turkic ''mamluk'' origin, ruling, at its greatest extent, large parts of Persia, Khorasan, much of Transoxiana and the northwes ...
, in modern-day central-eastern Afghanistan. In 1017 he travelled to the
Indian subcontinent The Indian subcontinent is a physiographical region in Southern Asia. It is situated on the Indian Plate, projecting southwards into the Indian Ocean from the Himalayas. Geopolitically, it includes the countries of Bangladesh, Bhutan, In ...
and wrote a treatise on Indian culture entitled ''Tārīkh al-Hind'' (History of India), after exploring the
Hindu Hindus (; ) are people who religiously adhere to Hinduism. Jeffery D. Long (2007), A Vision for Hinduism, IB Tauris, , pages 35–37 Historically, the term has also been used as a geographical, cultural, and later religious identifier for ...
faith practiced in
India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area, the List of countries and dependencies by population, second-most populous ...
. He was, for his time, an admirably impartial writer on the customs and creeds of various nations, his scholarly objectivity earning him the title ''al-Ustadh'' ("The Master") in recognition of his remarkable description of early 11th-century India.


Name

The name of al-Biruni is derived from the Persian word ''bērūn/bīrūn'' (meaning 'outskirts'), as he was born in an outlying district of
Kath Kath or KATH may refer to: * Kath (city), the historical capital of Khwarezm * Kath (name), a list of people and fictional characters with the given name or surname * KATH-TV, the NBC TV station in Juneau, Alaska * KATH (AM), a radio station in Te ...
, the capital of the Afrighid Khwarazmshahs.


Life

He was born in the outer district ( Bīrūn) of
Kath Kath or KATH may refer to: * Kath (city), the historical capital of Khwarezm * Kath (name), a list of people and fictional characters with the given name or surname * KATH-TV, the NBC TV station in Juneau, Alaska * KATH (AM), a radio station in Te ...
, the capital of the Afrighid dynasty of
Khwarezm Khwarazm (; Old Persian: ''Hwârazmiya''; fa, خوارزم, ''Xwârazm'' or ''Xârazm'') or Chorasmia () is a large oasis region on the Amu Darya river delta in western Central Asia, bordered on the north by the (former) Aral Sea, on the ...
(Chorasmia) in
Central Asia Central Asia, also known as Middle Asia, is a region of Asia that stretches from the Caspian Sea in the west to western China and Mongolia in the east, and from Afghanistan and Iran in the south to Russia in the north. It includes the fo ...
– now part of the
autonomous republic An autonomous republic is a type of administrative division similar to a province or state. A significant number of autonomous republics can be found within the successor states of the Soviet Union, but the majority are located within Russia. M ...
of Karakalpakstan in the northwest of
Uzbekistan Uzbekistan (, ; uz, Ozbekiston, italic=yes / , ; russian: Узбекистан), officially the Republic of Uzbekistan ( uz, Ozbekiston Respublikasi, italic=yes / ; russian: Республика Узбекистан), is a doubly landlocked co ...
. Al-Biruni spent the first twenty-five years of his life in Khwarezm where he studied
Islamic jurisprudence ''Fiqh'' (; ar, فقه ) is Islamic jurisprudence. Muhammad-> Companions-> Followers-> Fiqh. The commands and prohibitions chosen by God were revealed through the agency of the Prophet in both the Quran and the Sunnah (words, deeds, and ex ...
, theology, grammar,
mathematics Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics ...
,
astronomy Astronomy () is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, g ...
, medicine and philosophy and dabbled not only in the field of physics, but also in those of most of the other sciences. The
Iranian Iranian may refer to: * Iran, a sovereign state * Iranian peoples, the speakers of the Iranian languages. The term Iranic peoples is also used for this term to distinguish the pan ethnic term from Iranian, used for the people of Iran * Iranian lan ...
Khwarezmian language Khwārezmian (Khwarezmian: , ''zβ'k 'y xw'rzm''; also transliterated Khwarazmian, Chorasmian, Khorezmian) is an extinct East Iranian language closely related to Sogdian. The language was spoken in the area of Khwarezm (Chorasmia), centered ...
, which was Biruni's mother tongue, survived for several centuries after
Islam Islam (; ar, ۘالِإسلَام, , ) is an Abrahamic monotheistic religion centred primarily around the Quran, a religious text considered by Muslims to be the direct word of God (or '' Allah'') as it was revealed to Muhammad, the ...
until the
Turkification Turkification, Turkization, or Turkicization ( tr, Türkleştirme) describes a shift whereby populations or places received or adopted Turkic attributes such as culture, language, history, or ethnicity. However, often this term is more narrowly ...
of the region – at least some of the culture of ancient
Khwarezm Khwarazm (; Old Persian: ''Hwârazmiya''; fa, خوارزم, ''Xwârazm'' or ''Xârazm'') or Chorasmia () is a large oasis region on the Amu Darya river delta in western Central Asia, bordered on the north by the (former) Aral Sea, on the ...
endured – for it is hard to imagine that the commanding figure of Biruni, a repository of so much knowledge, should have appeared in a cultural vacuum. He was sympathetic to the
Afrighids The Afrighids ( Khwarazmian: ''ʾfryḡ'') were a native Khwarezmian IranianClifford Edmund Bosworth, The New Islamic Dynasties: A Chronological and Genealogical Manual, Columbia University, 1996. dynasty who ruled over the ancient kingdom of Kh ...
, who were overthrown by the rival dynasty of Ma'munids in 995. He left his homeland for
Bukhara Bukhara ( Uzbek: /, ; tg, Бухоро, ) is the seventh-largest city in Uzbekistan, with a population of 280,187 , and the capital of Bukhara Region. People have inhabited the region around Bukhara for at least five millennia, and the city ...
, then under the
Samanid The Samanid Empire ( fa, سامانیان, Sāmāniyān) also known as the Samanian Empire, Samanid dynasty, Samanid amirate, or simply as the Samanids) was a Persianate Sunni Muslim empire, of Iranian dehqan origin. The empire was centred in ...
ruler
Mansur II Abu'l-Harith Mansur II ( fa, منصور دوم سامانی) was Amir of the Samanids (997–999). He was the son of Nuh II. Biography Mansur II was still young when he succeeded his father as amir. His short reign was marked by his inabilit ...
the son of Nuh II. There he corresponded with
Avicenna Ibn Sina ( fa, ابن سینا; 980 – June 1037 CE), commonly known in the West as Avicenna (), was a Persian polymath who is regarded as one of the most significant physicians, astronomers, philosophers, and writers of the Islamic ...
and there are extant exchanges of views between these two scholars. In 998, he went to the court of the Ziyarid amir of
Tabaristan Tabaristan or Tabarestan ( fa, طبرستان, Ṭabarestān, or mzn, تبرستون, Tabarestun, ultimately from Middle Persian: , ''Tapur(i)stān''), was the name applied to a mountainous region located on the Caspian coast of northern Iran. ...
,
Qabus Qabus ibn Wushmagir (full name: ''Abol-Hasan Qābūs ibn Wušmagīr ibn Ziyar Sams al-maʿālī'', ; (died 1012) (r. 977–981; 997–1012) was the Ziyarid ruler of Gurgan and Tabaristan in medieval Iran. His father was Vushmgir and his mother wa ...
(). There he wrote his first important work, ''al-Athar al-Baqqiya 'an al-Qorun al-Khaliyya'' (literally: "The remaining traces of past centuries" and translated as "Chronology of ancient nations" or "Vestiges of the Past") on historical and scientific chronology, probably around 1000 C.E., though he later made some amendments to the book. He also visited the court of the
Bavandid The Bavand dynasty () (also spelled Bavend), or simply the Bavandids, was an Iranian dynasty that ruled in parts of Tabaristan (present-day Mazandaran province) in what is now northern Iran from 651 until 1349, alternating between outright inde ...
ruler Al-Marzuban. Accepting the definite demise of the Afrighids at the hands of the Ma'munids, he made peace with the latter who then ruled
Khwarezm Khwarazm (; Old Persian: ''Hwârazmiya''; fa, خوارزم, ''Xwârazm'' or ''Xârazm'') or Chorasmia () is a large oasis region on the Amu Darya river delta in western Central Asia, bordered on the north by the (former) Aral Sea, on the ...
. Their court at Gorganj (also in Khwarezm) was gaining fame for its gathering of brilliant scientists. In 1017,
Mahmud of Ghazni Yamīn-ud-Dawla Abul-Qāṣim Maḥmūd ibn Sebüktegīn ( fa, ; 2 November 971 – 30 April 1030), usually known as Mahmud of Ghazni or Mahmud Ghaznavi ( fa, ), was the founder of the Turkic Ghaznavid dynasty, ruling from 998 to 1030. At t ...
took Rey. Most scholars, including al-Biruni, were taken to Ghazni, the capital of the Ghaznavid dynasty. Biruni was made court astrologer and accompanied Mahmud on his invasions into India, living there for a few years. He was forty-four years old when he went on the journeys with Mahmud of Ghazni. Biruni became acquainted with all things related to
India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area, the List of countries and dependencies by population, second-most populous ...
. During this time he wrote his study of India, finishing it around 1030. Along with his writing, Al-Biruni also made sure to extend his study to science while on the expeditions. He sought to find a method to measure the height of the sun, and created a makeshift quadrant for that purpose. Al-Biruni was able to make much progress in his study over the frequent travels that he went on throughout the lands of India. Belonging to the
Sunni Sunni Islam () is the largest branch of Islam, followed by 85–90% of the world's Muslims. Its name comes from the word '' Sunnah'', referring to the tradition of Muhammad. The differences between Sunni and Shia Muslims arose from a dis ...
Ash'ari Ashʿarī theology or Ashʿarism (; ar, الأشعرية: ) is one of the main Sunnī schools of Islamic theology, founded by the Muslim scholar, Shāfiʿī jurist, reformer, and scholastic theologian Abū al-Ḥasan al-Ashʿarī in th ...
school, al-Biruni nevertheless also associated with
Maturidi Māturīdī theology or Māturīdism ( ar, الماتريدية: ''al-Māturīdiyyah'') is one of the main Sunnī schools of Islamic theology, founded by the Persian Muslim scholar, Ḥanafī jurist, reformer (''Mujaddid''), and scholastic ...
theologians. He was however, very critical of the
Mu'tazila Muʿtazila ( ar, المعتزلة ', English: "Those Who Withdraw, or Stand Apart", and who called themselves ''Ahl al-ʿAdl wa al-Tawḥīd'', English: "Party of ivineJustice and Oneness f God); was an Islamic group that appeared in early Islami ...
, particularly criticising
al-Jahiz Abū ʿUthman ʿAmr ibn Baḥr al-Kinānī al-Baṣrī ( ar, أبو عثمان عمرو بن بحر الكناني البصري), commonly known as al-Jāḥiẓ ( ar, links=no, الجاحظ, ''The Bug Eyed'', born 776 – died December 868/Jan ...
and Zurqan. He also repudiated
Avicenna Ibn Sina ( fa, ابن سینا; 980 – June 1037 CE), commonly known in the West as Avicenna (), was a Persian polymath who is regarded as one of the most significant physicians, astronomers, philosophers, and writers of the Islamic ...
for his views on the eternality of the universe.


Mathematics, astronomy and invention of minutes and seconds

Ninety-five of 146 books known to have been written by Bīrūnī are devoted to astronomy, mathematics, and related subjects like mathematical geography. He lived during the Islamic Golden Age, when the Abbasid Caliphs promoted astronomical research, because such research possessed not only a scientific but also a religious dimension: in Islam worship and prayer require a knowledge of the precise directions of sacred locations, which can be determined accurately only through the use of astronomical data. In carrying out his research, Al-Biruni used a variety of different techniques dependent upon the particular field of study involved. His major work on astrology is primarily an astronomical and mathematical text; he states: "I have begun with Geometry and proceeded to Arithmetic and the Science of Numbers, then to the structure of the Universe and finally to Judicial Astrology, for no one who is worthy of the style and title of Astrologer who is not thoroughly conversant with these for sciences." In these earlier chapters he lays the foundations for the final chapter, on astrological prognostication, which he criticises. He was the first to make the semantic distinction between astronomy and astrology and, in a later work, wrote a refutation of astrology, in contradistinction to the legitimate science of astronomy, for which he expresses wholehearted support. Some suggest that his reasons for refuting astrology relate to the methods used by astrologers being based upon
pseudoscience Pseudoscience consists of statements, beliefs, or practices that claim to be both scientific and factual but are incompatible with the scientific method. Pseudoscience is often characterized by contradictory, exaggerated or unfalsifiable claim ...
rather than
empiricism In philosophy, empiricism is an epistemological theory that holds that knowledge or justification comes only or primarily from sensory experience. It is one of several views within epistemology, along with rationalism and skepticism. Empir ...
and also to a conflict between the views of the astrologers and those of the orthodox
theologians Theology is the systematic study of the nature of the divine and, more broadly, of religious belief. It is taught as an academic discipline, typically in universities and seminaries. It occupies itself with the unique content of analyzing the s ...
of
Sunni Islam Sunni Islam () is the largest branch of Islam, followed by 85–90% of the world's Muslims. Its name comes from the word '' Sunnah'', referring to the tradition of Muhammad. The differences between Sunni and Shia Muslims arose from a disag ...
. He wrote an extensive commentary on
Indian astronomy Astronomy has long history in Indian subcontinent stretching from pre-historic to modern times. Some of the earliest roots of Indian astronomy can be dated to the period of Indus Valley civilisation or earlier. Astronomy later developed as a di ...
in the ''Taḥqīq mā li-l-Hind'' mostly translation of Aryabhatta's work, in which he claims to have resolved the matter of Earth's rotation in a work on astronomy that is no longer extant, his ''Miftah-ilm-alhai'a (Key to Astronomy)'':
e rotation of the earth does in no way impair the value of astronomy, as all appearances of an astronomic character can quite as well be explained according to this theory as to the other. There are, however, other reasons which make it impossible. This question is most difficult to solve. The most prominent of both modern and ancient astronomers have deeply studied the question of the moving of the earth, and tried to refute it. We, too, have composed a book on the subject called ''Miftah-ilm-alhai'a (Key to Astronomy)'', in which we think we have surpassed our predecessors, if not in the words, at all events in the matter.
In his description of Sijzi's astrolabe he hints at contemporary debates about the movement of the Earth. He carried on a lengthy correspondence and sometimes heated debate with
Ibn Sina Ibn Sina ( fa, ابن سینا; 980 – June 1037 CE), commonly known in the West as Avicenna (), was a Persian polymath who is regarded as one of the most significant physicians, astronomers, philosophers, and writers of the Islami ...
, in which Biruni repeatedly attacks Aristotle's celestial physics: he argues by simple experiment that the vacuum state must exist; he is "amazed" by the weakness of Aristotle's argument against elliptical orbits on the basis that they would create a vacuum; he attacks the immutability of the celestial spheres. In his major astronomical work, the ''Mas'ud Canon'', Biruni observed that, contrary to
Ptolemy Claudius Ptolemy (; grc-gre, Πτολεμαῖος, ; la, Claudius Ptolemaeus; AD) was a mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importanc ...
, the Sun's
apogee An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. For example, the apsides of the Earth are called the aphelion and perihelion. General description There are two apsides in any el ...
(highest point in the heavens) was mobile, not fixed. He wrote a treatise on the
astrolabe An astrolabe ( grc, ἀστρολάβος ; ar, ٱلأَسْطُرلاب ; persian, ستاره‌یاب ) is an ancient astronomical instrument that was a handheld model of the universe. Its various functions also make it an elaborate inclin ...
, describing how to use it to tell the time and as a quadrant for surveying. One particular diagram of an eight geared device could be considered an ancestor of later Muslim astrolabes and clocks. More recently, Biruni's eclipse data was used by Dunthorne in 1749 to help determine the acceleration of the moon, and his data on equinox times and eclipses was used as part of a study of Earth's past rotation. Al-Biruni was the person who first subdivided the hour
sexagesimal Sexagesimal, also known as base 60 or sexagenary, is a numeral system with sixty as its base. It originated with the ancient Sumerians in the 3rd millennium BC, was passed down to the ancient Babylonians, and is still used—in a modified form ...
ly into minutes, seconds, thirds and fourths in 1000 while discussing Jewish months.


Refutation of Eternal Universe

Like later adherents of the
Ash'ari Ashʿarī theology or Ashʿarism (; ar, الأشعرية: ) is one of the main Sunnī schools of Islamic theology, founded by the Muslim scholar, Shāfiʿī jurist, reformer, and scholastic theologian Abū al-Ḥasan al-Ashʿarī in th ...
school, such as
al-Ghazali Al-Ghazali ( – 19 December 1111; ), full name (), and known in Persian-speaking countries as Imam Muhammad-i Ghazali (Persian: امام محمد غزالی) or in Medieval Europe by the Latinized as Algazelus or Algazel, was a Persian poly ...
, al-Biruni is famous for vehemently defending the majority
Sunni Sunni Islam () is the largest branch of Islam, followed by 85–90% of the world's Muslims. Its name comes from the word '' Sunnah'', referring to the tradition of Muhammad. The differences between Sunni and Shia Muslims arose from a dis ...
position that the universe had a beginning, being a strong supporter of
creatio ex nihilo (Latin for "creation out of nothing") is the doctrine that matter is not eternal but had to be created by some divine creative act. It is a theistic answer to the question of how the universe comes to exist. It is in contrast to ''Ex nihilo n ...
, specifically refuting the philosopher
Avicenna Ibn Sina ( fa, ابن سینا; 980 – June 1037 CE), commonly known in the West as Avicenna (), was a Persian polymath who is regarded as one of the most significant physicians, astronomers, philosophers, and writers of the Islamic ...
in a multiple letter correspondence.Berjak R. ''The Medieval Arabic Era: Ibn Sina-Al-Biruni Correspondence.'' Trans by Rafik Berjak, (2005)Ahmed, Sulaiman. ''The Disagreement between Avicenna and al-Ghazali on the Issue of the Pre-eternity of the Universe, how their Arguments Originated from Greek Philosophers and their Effect on Muslim Philosophers.'' Diss. University of Wales Trinity Saint David, 2017. Al-Biruni stated the following,Sachau, C. Eduard, ed. ''The Chronology of Ancient Nations: An English Version of the Arabic Text of the Athâr-ul-Bâkiya of Albîrûni Or'Vestiges of the Past'' William H. Allen & Company, 1879.
He further stated that
Aristotle Aristotle (; grc-gre, Ἀριστοτέλης ''Aristotélēs'', ; 384–322 BC) was a Greek philosopher and polymath during the Classical period in Ancient Greece. Taught by Plato, he was the founder of the Peripatetic school of ...
, whose arguments Avicenna uses, contradicted himself when he stated that the universe and matter has a start whilst holding on to the idea that matter is pre-eternal. In his letters to Avicenna, he stated the argument of Aristotle, that there is a change in the creator. He further argued that stating there is a change in the creator would mean there is a change in the effect (meaning the universe has change) and that the universe coming into being after not being is such a change (and so arguing there is no change – no beginning – means Aristotle believes the creator is negated). Al-Biruni was proud of the fact that he followed the textual evidence of the religion without being influenced by Greek philosophers such as Aristotle.


Physics

Al-Biruni contributed to the introduction of the
scientific method The scientific method is an empirical method for acquiring knowledge that has characterized the development of science since at least the 17th century (with notable practitioners in previous centuries; see the article history of scientifi ...
to medieval
mechanics Mechanics (from Ancient Greek: μηχανική, ''mēkhanikḗ'', "of machines") is the area of mathematics and physics concerned with the relationships between force, matter, and motion among physical objects. Forces applied to objec ...
. He developed experimental methods to determine density, using a particular type of hydrostatic balance.


Geography and Geodesy

Bīrūnī devised a novel method of determining the Earth's radius by means of the observation of the height of a mountain. He carried it out at
Nandana Nandana or Nandna ( pnb, ) was a fort built at strategic location on a hilly range on the eastern flanks of the Salt Range in Punjab Pakistan. Its ruins, including those of a town and a temple, are present. It was ruled by the Hindu Shahi king ...
in Pind Dadan Khan (present-day Pakistan). He used trigonometry to calculate the radius of the Earth using measurements of the height of a hill and measurement of the dip in the horizon from the top of that hill. His calculated radius for the Earth of 3928.77 miles was 2% higher than the actual mean radius of 3847.80 miles. His estimate was given as 12,803,337 cubits, so the accuracy of his estimate compared to the modern value depends on what conversion is used for cubits. The exact length of a cubit is not clear; with an 18-inch cubit his estimate would be 3,600 miles, whereas with a 22-inch cubit his estimate would be 4,200 miles. One significant problem with this approach is that Al-Biruni was not aware of
atmospheric refraction Atmospheric refraction is the deviation of light or other electromagnetic wave from a straight line as it passes through the atmosphere due to the variation in air density as a function of height. This refraction is due to the velocity of ligh ...
and made no allowance for it. He used a dip angle of 34 arc minutes in his calculations, but refraction can typically alter the measured dip angle by about 1/6, making his calculation only accurate to within about 20% of the true value. In his ''Codex Masudicus'' (1037), Al-Biruni theorized the existence of a landmass along the vast ocean between Asia and Europe, or what is today known as the Americas. He argued for its existence on the basis of his accurate estimations of the
Earth's circumference Earth's circumference is the distance around Earth. Measured around the Equator, it is . Measured around the poles, the circumference is . Measurement of Earth's circumference has been important to navigation since ancient times. The first k ...
and
Afro-Eurasia Afro-Eurasia (also Afroeurasia, Eurafrasia or the Old World) is a landmass comprising the continents of Africa, Asia, and Europe. The terms are compound words of the names of its constituent parts. Its mainland is the largest and most popul ...
's size, which he found spanned only two-fifths of the Earth's circumference, reasoning that the geological processes that gave rise to
Eurasia Eurasia (, ) is the largest continental area on Earth, comprising all of Europe and Asia. Primarily in the Northern and Eastern Hemispheres, it spans from the British Isles and the Iberian Peninsula in the west to the Japanese archipelag ...
must surely have given rise to lands in the vast ocean between Asia and Europe. He also theorized that at least some of the unknown landmass would lie within the known latitudes which humans could inhabit, and therefore would be inhabited.


Pharmacology and mineralogy

Biruni wrote a
pharmacopoeia A pharmacopoeia, pharmacopeia, or pharmacopoea (from the obsolete typography ''pharmacopœia'', meaning "drug-making"), in its modern technical sense, is a book containing directions for the identification of compound medicines, and published by ...
, the "Kitab al-saydala fi al-tibb" (Book on the Pharmacopoeia of Medicine). It lists synonyms for drug names in Syriac, Persian, Greek, Baluchi, Afghan, Kurdi, and some Indian languages. He used a hydrostatic balance to determine the density and purity of metals and precious stones. He classified gems by what he considered their primary physical properties, such as
specific gravity Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its dens ...
and
hardness In materials science, hardness (antonym: softness) is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion. In general, different materials differ in their hardness; for example hard ...
, rather than the common practice of the time of classifying them by colour.


History and chronology

Biruni's main essay on political history, ''Kitāb al-musāmara fī aḵbār Ḵᵛārazm'' (Book of nightly conversation concerning the affairs of Ḵᵛārazm) is now known only from quotations in Bayhaqī's Tārīkh-e Masʿūdī. In addition to this various discussions of historical events and methodology are found in connection with the lists of kings in his al-Āthār al-bāqiya and in the Qānūn as well as elsewhere in the Āthār, in India, and scattered throughout his other works. Al-Biruni's "Chronology of Ancient Nations" attempted to accurately establish the length of various historical eras.


History of religions

Biruni is widely considered to be one of the most important Muslim authorities on the history of religion. He is known as a pioneer in the field of comparative religion in his study of, among other creeds,
Zoroastrianism Zoroastrianism is an Iranian religion and one of the world's oldest organized faiths, based on the teachings of the Iranian-speaking prophet Zoroaster. It has a dualistic cosmology of good and evil within the framework of a monotheisti ...
, Judaism,
Hinduism Hinduism () is an Indian religion or '' dharma'', a religious and universal order or way of life by which followers abide. As a religion, it is the world's third-largest, with over 1.2–1.35 billion followers, or 15–16% of the global p ...
, Christianity,
Buddhism Buddhism ( , ), also known as Buddha Dharma and Dharmavinaya (), is an Indian religion or philosophical tradition based on teachings attributed to the Buddha. It originated in northern India as a -movement in the 5th century BCE, and ...
and
Islam Islam (; ar, ۘالِإسلَام, , ) is an Abrahamic monotheistic religion centred primarily around the Quran, a religious text considered by Muslims to be the direct word of God (or '' Allah'') as it was revealed to Muhammad, the ...
. He assumed the superiority of Islam: "We have here given an account of these things in order that the reader may learn by the comparative treatment of the subject how much superior the institutions of Islam are, and how more plainly this contrast brings out all customs and usages, differing from those of Islam, in their essential foulness." However he was happy on occasion to express admiration for other cultures, and quoted directly from the sacred texts of other religions when reaching his conclusions. He strove to understand them on their own terms rather than trying to prove them wrong. His underlying concept was that all cultures are at least distant relatives of all other cultures because they are all human constructs. "Rather, what Al-Biruni seems to be arguing is that there is a common human element in every culture that makes all cultures distant relatives, however foreign they might seem to one another." Al-Biruni divides
Hindus Hindus (; ) are people who religiously adhere to Hinduism. Jeffery D. Long (2007), A Vision for Hinduism, IB Tauris, , pages 35–37 Historically, the term has also been used as a geographical, cultural, and later religious identifier for ...
into an educated and an uneducated class. He describes the educated as monotheistic, believing that God is one, eternal, and omnipotent and eschewing all forms of idol worship. He recognizes that uneducated Hindus worshiped a multiplicity of idols yet points out that even some Muslims (such as the Jabriyah) have adopted
anthropomorphic Anthropomorphism is the attribution of human traits, emotions, or intentions to non-human entities. It is considered to be an innate tendency of human psychology. Personification is the related attribution of human form and characteristics t ...
concepts of God.


Anthropology

Al-Biruni wrote about the peoples, customs and religions of the Indian subcontinent. According to Akbar S. Ahmed, like modern anthropologists, he engaged in extensive participant observation with a given group of people, learnt their language and studied their primary texts, presenting his findings with objectivity and neutrality using cross-cultural comparisons. Akhbar S. Ahmed concluded that Al-Biruni can be considered as the first Anthropologist, others, however, have argued that he can hardly be considered an anthropologist in the conventional sense.


Indology

Al-Biruni's fame as an Indologist rests primarily on two texts. Al-Biruni wrote an encyclopedic work on India called ''Taḥqīq mā li-l-Hind min maqūlah maqbūlah fī al-ʿaql aw mardhūlah'' (variously translated as "Verifying All That the Indians Recount, the Reasonable and the Unreasonable" or "The book confirming what pertains to India, whether rational or despicable") in which he explored nearly every aspect of Indian life, including religion, history, geography, geology, science, and mathematics. During his journey through India, military and political history were not Al-Biruni's main focus: he decided rather to document the civilian and scholarly aspects of Hindu life, examining culture, science, and religion. He explores religion within a rich cultural context. He expresses his objective with simple eloquence: He also translated the
Yoga sutras The ''Yoga Sutras of Patañjali'' is a collection of Sanskrit sutras ( aphorisms) on the theory and practice of yoga – 195 sutras (according to Vyāsa and Krishnamacharya) and 196 sutras (according to others, including BKS Iyengar). The ...
of Indian sage
Patanjali Patanjali ( sa, पतञ्जलि, Patañjali), also called Gonardiya or Gonikaputra, was a Hindu author, mystic and philosopher. Very little is known about him, and while no one knows exactly when he lived; from analysis of his works it i ...
with the title ''Tarjamat ketāb Bātanjalī fi’l-ḵalāṣ men al-ertebāk''. An example of Al-Biruni's analysis is his summary of why many Hindus hate Muslims. Biruni notes in the beginning of his book how the Muslims had a hard time learning about Hindu knowledge and culture. He explains that Hinduism and Islam are totally different from each other. Moreover, Hindus in 11th century India had suffered waves of destructive attacks on many of its cities, and Islamic armies had taken numerous Hindu slaves to Persia, which – claimed Al-Biruni – contributed to Hindus becoming suspicious of all foreigners, not just Muslims. Hindus considered Muslims violent and impure, and did not want to share anything with them. Over time, Al-Biruni won the welcome of Hindu scholars. Al-Biruni collected books and studied with these Hindu scholars to become fluent in Sanskrit, discover and translate into Arabic the mathematics, science, medicine, astronomy and other fields of arts as practiced in 11th-century India. He was inspired by the arguments offered by Indian scholars who believed earth must be globular in shape, which they felt was the only way to fully explain the difference in daylight hours by latitude, seasons and Earth's relative positions with Moon and stars. At the same time, Al-Biruni was also critical of Indian scribes, who he believed carelessly corrupted Indian documents while making copies of older documents. He also criticized the Hindus on what he saw them do and not do, for example finding them deficient in curiosity about history and religion. One of the specific aspects of Hindu life that Al-Biruni studied was the
Hindu calendar The Hindu calendar, Panchanga () or Panjika is one of various lunisolar calendars that are traditionally used in the Indian subcontinent and Southeast Asia, with further regional variations for social and Hindu religious purposes. They adopt ...
. His scholarship on the topic exhibited great determination and focus, not to mention the excellence in his approach of the in-depth research he performed. He developed a method for converting the dates of the Hindu calendar to the dates of the three different calendars that were common in the Islamic countries of his time period, the Greek, the Arab/Muslim, and the Persian. Biruni also employed astronomy in the determination of his theories, which were complex mathematical equations and scientific calculation that allows one to convert dates and years between the different calendars. The book does not limit itself to tedious records of battle because Al-Biruni found the social culture to be more important. The work includes research on a vast array of topics of Indian culture, including descriptions of their traditions and customs. Although he tried to stay away from political and military history, Biruni did indeed record important dates and noted actual sites of where significant battles occurred. Additionally, he chronicled stories of Indian rulers and told of how they ruled over their people with their beneficial actions and acted in the interests of the nation. His details are brief and mostly just list rulers without referring to their real names, and he did not go on about deeds that each one carried out during their reign, which keeps in line with Al-Biruni's mission to try to stay away from political histories. Al-Biruni also described the geography of India in his work. He documented different bodies of water and other natural phenomena. These descriptions are useful to today's modern historians because they are able to use Biruni's scholarship to locate certain destinations in modern-day India. Historians are able to make some matches while also concluding that certain areas seem to have disappeared and been replaced with different cities. Different forts and landmarks were able to be located, legitimizing Al-Biruni's contributions with their usefulness to even modern history and archeology. The dispassionate account of Hinduism given by Al-Biruni was remarkable for its time. He stated that he was fully objective in his writings, remaining unbiased like a proper historian should. Biruni documented everything about India just as it happened. But, he did note how some of the accounts of information that he was given by natives of the land may not have been reliable in terms of complete accuracy, however, he did try to be as honest as possible in his writing. Dr. Edward C. Sachau compares it to "a magic island of quiet, impartial research in the midst of a world of clashing swords, burning towns, and plundered temples." Biruni's writing was very poetic, which may diminish some of the historical value of the work for modern times. The lack of description of battle and politics makes those parts of the picture completely lost. However, Many have used Al-Biruni's work to check facts of history in other works that may have been ambiguous or had their validity questioned.


Works

Most of the works of Al-Biruni are in
Arabic Arabic (, ' ; , ' or ) is a Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C. E.Watson; Walter ...
although he seemingly wrote the ''Kitab al-Tafhim'' in both Persian and Arabic, showing his mastery over both languages.S.H. Nasr, "An introduction to Islamic cosmological doctrines: conceptions of nature and methods used for its study by the Ikhwān al-Ṣafāʾ, al-Bīrūnī, and Ibn Sīnā", 2nd edition, Revised. SUNY press, 1993. pp 111: "Al-Biruni wrote one of the masterpieces of medieval science, Kitab al-Tafhim, apparently in both Arabic and Persian, demonstrating how conversant he was in both tongues. The Kitab al-Tafhim is without doubt the most important of the early works of science in Persian and serves as a rich source for Persian prose and lexicography as well as for the knowledge of the Quadrivium whose subjects it covers in a masterly fashion" Bīrūnī's catalogue of his own literary production up to his 65th lunar/63rd solar year (the end of 427/1036) lists 103 titles divided into 12 categories: astronomy, mathematical geography, mathematics, astrological aspects and transits, astronomical instruments, chronology, comets, an untitled category, astrology, anecdotes, religion, and books he no longer possesses.


Selection of extant works

* ''Taḥqīq mā li-l-Hind'' ("A Critical Study of What India Says, Whether Accepted by Reason or Refused"; ), popuarly called ''Kitāb al-Hind'' ("The book on India"); English translations called ''Indica'' or ''Alberuni's India'' (Translation) – compendium of India's religion and philosophy. * Book of Instruction in the Elements of the Art of Astrology (''Kitab al-tafhim li-awa’il sina‘at al-tanjim''); in Persian * The Remaining Signs of Past Centuries () – a comparative study of calendars of cultures and civilizations, (including several chapters on Christian cults) with mathematical, astronomical, and historical information. *
Melkite The term Melkite (), also written Melchite, refers to various Eastern Christian churches of the Byzantine Rite and their members originating in the Middle East. The term comes from the common Central Semitic root ''m-l-k'', meaning "royal", a ...
Calendar, or ''Les Fetes des Melchites'' – Arabic text with French translation extract from ''The Remaining Signs of Past Centuries''. * The Mas'udi Law () – encyclopedia of astronomy, geography, and engineering, dedicated to Mas'ud, son of
Mahmud of Ghazni Yamīn-ud-Dawla Abul-Qāṣim Maḥmūd ibn Sebüktegīn ( fa, ; 2 November 971 – 30 April 1030), usually known as Mahmud of Ghazni or Mahmud Ghaznavi ( fa, ), was the founder of the Turkic Ghaznavid dynasty, ruling from 998 to 1030. At t ...
of the eponymous title. * Understanding Astrology () – a question and answer style book about mathematics and astronomy, in Arabic and Persian. * Pharmacy – on drugs and medicines. * Gems () – geology manual of minerals and gems. Dedicated to Mawdud son of Mas'ud. * Astrolabe * A Short History * History of Mahmud of Ghazni and his father * History of Khawarezm * ''Kitab al-Āthār al-Bāqīyah ‘an al-Qurūn al-Khālīyah''. * ''Risālah li-al-Bīrūnī'' (Epître de Berūnī)


Persian work

Biruni wrote most of his works in
Arabic Arabic (, ' ; , ' or ) is a Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C. E.Watson; Walter ...
, as the scientific language of his age, however, his Persian version of the Al-Tafhim is one of the most important of the early works of science in the
Persian language Persian (), also known by its endonym Farsi (, ', ), is a Western Iranian language belonging to the Iranian branch of the Indo-Iranian subdivision of the Indo-European languages. Persian is a pluricentric language predominantly spoken an ...
, and is a rich source for Persian prose and lexicography. The book covers the
Quadrivium From the time of Plato through the Middle Ages, the ''quadrivium'' (plural: quadrivia) was a grouping of four subjects or arts—arithmetic, geometry, music, and astronomy—that formed a second curricular stage following preparatory work in the ...
in a detailed and skilled fashion.


Legacy

Extraordinarily, following Al-Biruni's death, during the remainder of the period of
Ghaznavid The Ghaznavid dynasty ( fa, غزنویان ''Ġaznaviyān'') was a culturally Persianate, Sunni Muslim dynasty of Turkic ''mamluk'' origin, ruling, at its greatest extent, large parts of Persia, Khorasan, much of Transoxiana and the northwest ...
rule and the centuries following, his work was neither built upon, nor even referenced. It was only centuries later (and in the West at that), that his works were once again read and reference made to them – most notably in the case of his book on India, which became relevant to the
British Empire The British Empire was composed of the dominions, colonies, protectorates, mandates, and other territories ruled or administered by the United Kingdom and its predecessor states. It began with the overseas possessions and trading posts e ...
's activity in India from the 17th century. A film about his life, ''Abu Raykhan Beruni'', was released in the
Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen nationa ...
in 1974. The lunar crater
Al-Biruni Abu Rayhan Muhammad ibn Ahmad al-Biruni (973 – after 1050) commonly known as al-Biruni, was a Khwarazmian Iranian in scholar and polymath during the Islamic Golden Age. He has been called variously the "founder of Indology", "Father of Co ...
and the asteroid
9936 Al-Biruni 9936 Al-Biruni, provisional designation , is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 8 August 1986, by Belgian and Bulgarian astronomers Eric Elst and Viol ...
were named in his honour. Biruni Island in
Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest cont ...
is named after Al-Biruni. In Iran, Biruni's birthday is celebrated as the day of the surveying engineer. In June 2009,
Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...
donated a pavilion to the United Nations Office in Vienna—placed in the central Memorial Plaza of the Vienna International Center. Named the Scholars Pavilion, it features the statues of four prominent Iranian scholars:
Avicenna Ibn Sina ( fa, ابن سینا; 980 – June 1037 CE), commonly known in the West as Avicenna (), was a Persian polymath who is regarded as one of the most significant physicians, astronomers, philosophers, and writers of the Islamic ...
, Abu Rayhan Biruni, Zakariya Razi (Rhazes) and
Omar Khayyam Ghiyāth al-Dīn Abū al-Fatḥ ʿUmar ibn Ibrāhīm Nīsābūrī (18 May 1048 – 4 December 1131), commonly known as Omar Khayyam ( fa, عمر خیّام), was a polymath, known for his contributions to mathematics, astronomy, philosophy, an ...
.


In popular culture

* Al-Biruni has been portrayed by Cüneyt Uzunlar in turkish series '' Alparslan: Büyük Selçuklu'' which is currently airing on
TRT 1 TRT 1 (''TRT One'') is the first Turkish national television channel, owned by state broadcaster TRT. It was launched on 31 January 1968 as a test broadcast and was officially launched in December 1971. It was the only channel in Turkey until 15 ...
. * Irrfan Khan portrayed Al-Biruni in 1988
Doordarshan Doordarshan (abbreviated as DD; Hindi: , ) is an Indian public service broadcaster founded by the Government of India, owned by the Ministry of Information and Broadcasting and one of Prasar Bharati's two divisions. One of India's largest b ...
's historical drama ''
Bharat Ek Khoj ''Bharat Ek Khoj'' () is a 53-episode Indian historical drama based on the book '' The Discovery of India'' (1946) by Jawaharlal Nehru that covers a 5,000-year history of India from its beginnings to independence from the British in 1947. The ...
''.


Notes and references


Notes


Citations


Bibliography

* * * * * * * * * * * * * * * * * * * * * * * * * * * * ,
PDF
* *


Further reading

*
At Packard Institute
* * *


External links

*
Abu Rayhan al- Biruni
at ''
Encyclopedia.com Encyclopedia.com (also known as HighBeam Encyclopedia) is an online encyclopedia. It aggregates information from other published dictionaries, encyclopedias and reference works including pictures and videos. History The website was launched by ...
''
The works of al-Bīrūnī – manuscripts, critical editions, and translations
{{DEFAULTSORT:Biruni, Abu Rayhan al- 973 births People from Karakalpakstan Medieval Iranian astrologers 11th-century Iranian philosophers Pharmacologists of medieval Iran 10th-century Iranian mathematicians 11th-century Iranian scientists 11th-century Iranian historians 11th-century Iranian geographers Geographers of the medieval Islamic world Alchemists of the medieval Islamic world Explorers of Asia Explorers of India Islamic philosophers Scientists who worked on qibla determination Indologists Iranian anthropologists Historians of India 11th-century Iranian astronomers Ghaznavid scholars Samanid scholars Inventors of the medieval Islamic world Transoxanian Islamic scholars Year of death unknown Iranian chemists Asharis Psychology in the medieval Islamic world