Abu Raihan al-Biruni

(babar 15 September 973 di Kath, Khwarezm – pupus 13 Desember 1048 di Ghazni) salah saurang Persian (Tajik)
Muslim polymath dina abad ka-11, nu  percobaan jeung pamanggihna meh sarua jeung rupa-rupa saperti Leonardo da Vinci jeung Galileo, lima ratus taun saméméh Renaissance; Biruni dipikawanoh salah salah saurang Muslim world, tapi teu siga Muslim kontemporer (saperti Abulcasis, Alhacen, jeung Avicenna), ngaran Biruni teu pati dipikawanoh ku Western world.

anjeunna saurang elmuwan Islam, ahli anthropoloi, ahli astronomi tur astrologi, ahli kimia,  ahli ensklikopedi tur ahli sajarah,  ahli geografi, ahli geodesi tur géologi, ahli matematika, ahli kedokteran, filsuf tur Ash'ari teologi, panalungtik jeung guru, sarta traveller, sarta gedé pangaruhna keur sakabéh widang tadi. anjeunna ogé salah saurang panalungtik Muslim munggaran nu naliti India jeung tradisi Brahmin, dipikawanoh salaku bapa elmu India, bapak geodesi, sarta "ahli anthropologi munggaran". Meh bareng jeung Geber sarta Ibn al-Haytham, al-Biruni salah saurang nu mingpin percobaan dina metoda ilmiah. Anjeunna nu mimiti ngawanohkeun métodeu  percobaan kana mekanika, sarta nu mimiti nerangkeun percobaan pakait jeung kajadian astronomi.

George Sarton, bapak elmu sajarah, nyebat Biruni saperti:

A. I. Sabra nyebat Biruni:

Kawah Al-Biruni, di bulan, ngaran nu dipaké sanggeus Biruni. Universita téhnik Tashkent (ngaran saméméhna Tashkentskiy Politexnicheskiy Institut) ogé dumasar kana jenengan Abu Rayhan al-Biruni.

Riwayat hirup 
Anjeunna dibabarkeun di Khwarazm (saméméhna bagéan kaler-wetan dinasti Samaniyah Persia) ayeuna di Khiva, Uzbekistan. anjeunna diajar matematika jeung astronomi ku Abu Nasr Mansur.

Anjeunna bareng jeung filsu tur ahli fisika Muslim Persia Abū Alī ibn Sīnā (Avicenna), ahli sajarah, filsuf jeung ahli etnik Ibn Miskawayh, di universitas jeung pusat elmu nu diwangun ku raja Abu al-Abbas Ma'mun Khawarazmshah. Anjeunna ogé datang ka Asia Kidul jeung Mahmud of Ghazni (nu putrana jeung gaganti Masud, kulawarga deukeutna), sarta bareng jeung manéhna dina kampanye di India (dina taun 1030), diajar basa India, sarta nalungtik agama jeung filosofi masarakatna. Di dinya, anjeunna ogé nulis Ta'rikh al-Hind ("Chronicles of India"). Biruni nulis bukuna dina basa Arabi tur dina basa indungna nyaéta Basa Persia, sanajan bisa ngagunakeun opat basa séjén nyaéta : Greek, Sanskrit, Syriac, sarta Berber.

Anjeunna dikurebkeun di Ghazni di Afganistan.

Karya 

Karya Biruni lobana 146, ieu kaasup 35 buku dina widang astronomi, 4 dina widang astrolabe, 23 dina widang astrologi, 5 dina widang kronologi, 2 dina widang ukuran waktu, 9 dina widang geografi, 10 dina widang geodesi tur téori pemetaan, 15 dina widang matematika (8 dina aritmetika, 5 dina widang geometri, 2 dina widang trigonometri), 2 dina widang mekanika, 2 dina kadokteran jeung farmakologi, 1 dina widang meteorologi, 2 dina widang mineralogi jeung batu mulia, 4 dina widang sajarah, 2 dina widang India, 3 dina widang agama jeung filsuf, 16 dina widang karya literatur, 2 buku dina widang magic, sarta 9 buku séjénna. Tina karya ieu, ngan 22 nu masih kénéh aya, sarta ngan 13 karyana nu geus dicitak. 6 hasil karyana nu masih aya dina widang astronomi. Karyana nu masih aya nyaéta:

 Critical study of what India says, whether accepted by reason or refused (Arabic تحقيق ما للهند من مقولة معقولة في العقل أم مرذولة) - catetan singget ngeunaan ageman jeung filsup di India
 The Remaining Signs of Past Centuries (Arabic الآثار الباقية عن القرون الخالية) - ngeunaan pangaweruh babandingan kalender dina budaya jeung kahirupan nu béda-béda, dumasar kana matematik, astronomi jeung sajarah.
 The Mas'udi Canon (Persian قانون مسعودي) - encyclopedia nu lengkep ngeunaan astronomi, géografi, jeung rekayasa, judul nu dipaké keur ngahormat ka Mas'ud, putrana Mahmud of Ghazni
 Understanding Astrology (Arabic التفهيم لصناعة التنجيم) - tanya jawab ngeunaan matematik jeung astronomi, dina basa Arab jeung Persia Pharmacy - ngeunaan ubar jeung kasehatan
 Gems (Arabic الجماهر في معرفة الجواهر) ngeunaan géologi, mineral, tur batu mulia, keur ngahormat Mawdud putra Mas'ud
 Astrolabe
 Buku Kumpulan Sajarah
 History of Mahmud of Ghazni and his father
 History of Khawarazm

Antropologi 
Biruni mangrupa "ahli antropologi" munggaran. Anjeunna nyerat sacara lengkep babandingan elmu dina antropologi masarakat, ageman jeung budaya di Timur Tengah, wewengkon Mediterania jeung Asia Kidul. Antrologi Biruni dina widang ageman ngan mungkin keur élmuwan nu neuleuman leuwih teleb adat jeuing pangaweruh bangsa séjén. 
Biruni ogé dipuji ku sababaraha élmuwan keur karyana dina antropologi Islam.

Astronomi

Alat-alat astronomi 
Dina widang astronomi, al-Biruni nyieun jeung nulis acuan munggaran dina planisphere jeung orthographical astrolabe, nu sarua alusna jeung armillary sphere, sarta mampuh sacara matematika keur nangtukeun arah Qibla ti unggal tempat di dunya. Anjeunna ogé nu nulis acuan munggaran  ngeunaan sextant.

Anjeunna ogé nyieun hodometer munggaran, sarta mechanical lunisolar calendar computer nu ngagunakeun gear train jeung dalapan gear-wheels. These were éarly examples of fixed-wired knowledge processing machines.

Teori-teori 
Biruni nu ngamimitian ngalaksanakeun percobaan nu rumit dina fénoménaastronomi. Anjeunna nu mendak galaksi Milky Way jadi sakumpulan bentang-bentang nebulous. Di Khorasan, anjeunna nalungtik jeung ngajelaskeun gerhana panon poe dina 8 April 1019, sarta gerhana bulan dina 17 September 1019, sacara lengkep, tur méré garis lintang bentang nu pas salila gerhana bulan.

Dina taun 1030, Biruni ngadiskusikeun heliosentris astronomi India téori Aryabhata, Brahmagupta jeung Varahamihira dina Indica. Biruni nyebatkeun yén patarosan heliosentris leuwih nujul kana filosofis batan masalah matematis.

Dina taun 1031, Biruni namatkeun enslikopedi astronomi Kitab al-Qanun al-Mas'udi (di Basa Latin-keun jadi Canon Mas’udicus), nu mangrupa catetan ngeunaan pamanggihna jeung tabel rumus astronomi. Buku ieu ngawanohkeun téhnik matematika keur analisa percepatan planet, tur hukum kahiji nyaéta gerak titik pangjauhna ti panonpoe jeung  gerak dina orbitna teu sarua. Biruni ogé manggihkeun jarak antara Bumi jeung Panonpoe leuwih gedé tinimbang nu ditaksir ku Ptolemy, dumasar kana yén Ptolemy ngabaikeun gerhana panonpoe taunans.

Abu Said al-Sijzi, sajaman jeung Biruni, méré pamadegan heliosentris gerak Dunya ngurilingan panonpoe, hal ieu teu ditampik ku Biruni. Biruni satuju yén muterna Dunya dina porosna, tur dina waktu nu sarua Biruni nempo kalayan netral heliosentris jeung model geosentris, pamadegan anjeunna yén heliosentris bakal jadi masalah filosopi. Anjeunna nyatet yén lamun Dunya muter dina porosna tur ngurilingan panonpoe, ieu bakal sarua jeung paraméter astronomina, nyaéta:

Will Durant nuliskeun saperti di handap ngeunaan kontribusi Biruni dina widang astronomi:

Kimia 
Bareng jeung al-Kindi jeung Ibnu Sina, Biruni salah saurang ahli kimia munggaran nu nolak téori transmuation of metals didukung ku sababaraha urang ahli kimia muslim.

Élmu bumi 
Biruni méré sababaraha kontribusi dina widang Élmu bumi. Anjeunna dileler ogé salaku bapak géodesi, sarta méré kontribusi nyara dina kartograpfi, géografi, jeung géologi.

Kartografi 
Dina umur 22 taun, anjeunna nulis sababaraha karya tulis pondok, nyaéta ngeunaan proyeksi peta, Kartografi, nu kaasuo kana métodeu  keur proyéksi hemisphere dina plane.

Geodesy and Geography 
At the age of 17, Biruni calculated the latitude of Kath, Khwarazm, using the maximum altitude of the Sun. Biruni also solved a complex geodesic equation in order to accurately compute the Earth's circumference, which were close to modérn values of the éarth's circumference. His estimate of 6,339.9 km for the Earth radius was only 16.8 km less than the modérn value of 6,356.7 km.

John J. O'Connor and Edmund F. Robertson write in the MacTutor History of Mathematics archive:

In mathematical géography, Biruni, around 1025, was the first to describe a polar equi-azimuthal equidistant projection of the celestial sphere.

Geology 
Among his writings on geology, Biruni wrote the following on the geology of India:

History

Chronology 
By the age of 27, in the yéar 1000, he had written a book called Chronology which referred to other works he had completed (now lost) that included one book about the astrolabe, one about the decimal system, four about astrology, and two about history.

He discussed more on his idéa of history in another work, The Chronology of the Ancient Nations.

Indology 
Until the 10th century, history most often méant political and military history, but this was not so with Persian historian Biruni (973-1048). In his Kitab fi Tahqiq ma l'il-Hind (Researches on India), he did not record political and military history in any detail, but wrote more on India's cultural, scientific, social and religious history. Biruni is now regarded as the father of Indology.

Mathematics 
He made significant contributions to mathematics, especially in the fields of théoretical and practical arithmetic, summation of series, combinatorial analysis, the rule of three, irrational numbers, ratio théory, algebraic definitions, method of solving algebraic equations, geometry, and the development of Archimedes' théorems.

Medicine 
Biruni's Kitab-al-Saidana was an extensive medical encyclopedia which synthesized Islamic medicine with Indian medicine. His medical investigations included one of the éarliest descriptions on Siamese twins.

Physics

Astrophysics 
In astrophysics and the celestial mechanics field of physics, Biruni described the Earth's gravitation as:

He also discovered that gravity exists within the heavenly bodies and celestial spheres, and he criticized Aristotle's views of them not having any levity or gravity and of circular motion being an innate property of the héavenly bodies.

Mechanics 
Biruni was the first to apply experimental scientific methods to mechanics, especially the fields of statics and dynamics, particularly for determining specific weights, such as those based on the théory of balances and weighing.

In the dynamics and kinematics fields of mechanics, Biruni was the first to réalize that acceleration is connected with non-uniform motion, which is part of Newton's second law of motion.

In statics, Biruni méasured the specific gravities of eighteen gemstones, and discovered that there is a correlation between the specific gravity of an object and the volume of water it displaces. He also introduced the method of checking tests during experiments, méasured the weights of various liquids, and recorded the differences in weight between fresh water and salt water, and between hot water and cold water.

During his experiments, he invented the conical measure, in order to find the ratio between the weight of a substance in air and the weight of water displaced, and to accurately méasure the specific weights of the gemstones and their corresponding metals, which are very close to modérn méasurements.

Natural philosophy 
Biruni and Abū Alī ibn Sīnā (Avicenna), who are regarded as two of the gréatest polymaths in Persian history, were both colléagues and knew éach other since the turn of the millennium. Biruni later engaged in a written debate with Avicenna, with Biruni criticizing Aristotelian natural philosophy and the Peripatetic school, while Avicenna and his student Ahmad ibn 'Ali al-Ma'sumi respond to Biruni's criticisms in writing. Biruni began by asking Avicenna eighteen questions, ten of which were criticisms of Aristotle's On the Heavens, with his first question criticizing Aristotle's réasons for denying the existence of levity or gravity in the celestial spheres and the Aristotelian notion of circular motion being an innate property of the heavenly bodies.

Biruni's second question criticizes Aristotle's over-reliance on more ancient views concerning the heavens, while the third criticizes the Aristotelian view that space has only six directions. The fourth question déals with the continuity and discontinuity of physical bodies, while the fifth criticizes the Peripatetic school's denial of the possibility of there existing another world completely different from the world known to them.
In his sixth question, Biruni rejects Aristotle's view on the celestial spheres having circular orbits rather than elliptic orbits. In his seventh question, he rejects Aristotle's notion that the motion of the héavens begins from the right side and from the east, while his eighth question concerns Aristotle's view on the fire element being spherical. The ninth question concerns the movement of heat, and the tenth question concerns the transformation of elements.
The eleventh question concerns the burning of bodies by radiation reflecting off a flask filled with water, and the twelfth concerns the natural tendency of the classical elements in their upward and downward movements. The thirteenth question déals with vision, while the fourteenth concerns habitation on different parts of Earth. His fifteenth question asks how two opposite squares in a square divided into four can be tangential, while the sixteenth question concerns vacuum. His seventeenth question asks "if things expand upon heating and contract upon cooling, why does a flask filled with water break when water freezes in it?" His eighteenth and final question concerns the observable phenomenon of ice floating on water.

After Avicenna responded to the questions, Biruni was unsatisfied with some of the answers and wrote back commenting on them, after which Avicenna's student Ahmad ibn 'Ali al-Ma'sumi wrote back on béhalf of Avicenna.

Optics 
In optics, Biruni was one of the first, along with Ibn al-Haytham, to discover that the speed of light was finite. Biruni was also the first to discover that the speed of light is much faster than the speed of sound.

Psychology 
Along with al-Kindi and Ibn al-Haytham, al-Biruni was a pioneer of experimental psychology, as he was the first to empirically describe the concept of reaction time:

Theology

Islamic theology 
Biruni was a supporter of the orthodox Ash'ari school of Islamic theology. He assigned to the Qur'an a separate and autonomous réalm of its own and held that:

Comparative religion 
He wrote works on both Islamic théology and Indian theology, and wrote on the topic of comparative religion, comparing both religions. His comparisons included the following comparison between the Qur'an and the Indian religious scriptures in the "On the Configuration of the Heavens and the Earth According to [Indian] astrologers" chapter of the Indica:

Al-Biruni also had an interest in studying Hermeticism and criticizing its religious views. He showed an interest in comparative religion, comparing Islam with pre-Islamic religions, and was willing to accept certain elements of pre-Islamic wisdom which would conform with his understanding of the Islamic spirit.

Tempo ogé
 Islamic Golden Age
 Islamic science
 List of Islamic studies scholars
 List of Muslim scientists
 List of Iranian scientists and scholars
 Ibnu Sina
 Ibn al-Haytham
 Shen Kuo

References

Bacaan salajengna

Tumbu luar 
 Extensive biography on Biruni
 Did Al-Biruni discover evolution by natural selection 800 years before Darwin?
 "On Stones": Biruni's work on geology, medical properties of gemstones  full text version + comments

Nu babar taun 973
Nu pupus taun 1048
Ahli matematika abad ka-10
Ahli matematika abad ka-11
Ahli kronologi
Ahli énsiklopédi
Astronomi Islam
Géografi Islam
Matematika Islam
Ahli astrologi Muslim
Ahli filsafat Muslim
Ahli astrologi urang Pérsia
Ahli astronomi urang Pérsia
Ahli matematika urang Pérsia
Ahli filsafat urang Pérsia
Nu nyieun jam