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111 relations: A Treatise on the Astrolabe, Abd al-Rahman al-Sufi, Al-Battani, Al-Biruni, Al-Nayrizi, Ali Ibn Ibrahim Qomi, Alidade, Altitude, Antikythera mechanism, Apollonius of Perga, Arabic, Armillary sphere, Astrarium, AstroLabs, Astrology in medieval Islam, Astronomical clock, Astronomical object, Astronomy, Astronomy in the medieval Islamic world, Azimuth, Batch production, Byzantine Empire, Calendar, Canterbury Astrolabe Quadrant, Celestial sphere, Christian of Prachatice, Circle, Classical antiquity, Clime, Cosmolabe, Creative Commons license, Declination, Degree (angle), Dioptra, Division of labour, Ecliptic, Equatorium, Floruit, Folk etymology, Geoffrey Chaucer, Geography and cartography in medieval Islam, Georg Hartmann, Greek language, Hellenistic period, Hipparchus, Horizon, Hour, Hypatia, Inclinometer, Isfahan, ..., Islamic calendar, Islamic Golden Age, Jainism, Johannes Stöffler, John Philoponus, Latitude, List of inventions in the medieval Islamic world, Mahendra Sūri, Mariner's astrolabe, Marshall Islands stick chart, Mashallah ibn Athari, Mathematical instrument, Mathematics in medieval Islam, Mecca, Middle Ages, Muḥammad ibn Ibrāhīm al-Fazārī, Muhammad ibn Musa al-Khwarizmi, National Maritime Museum, Navigator, Nocturnal (instrument), Orbital inclination, Orrery, Oxford English Dictionary, OxfordDictionaries.com, Paris, Petrus Peregrinus de Maricourt, Philippe Danfrie, Planetarium, Planisphere, Plato Tiburtinus, Pointer (rod), Pope Sylvester II, Prague astronomical clock, Prince Henry the Navigator, Princeton University Press, Ptolemy, Qibla, Quadrivium, Renaissance, Richard N. Frye, Richard of Wallingford, Ruler, Salah, Severus Sebokht, Sextant (astronomical), Sharaf al-Dīn al-Ṭūsī, Sky, Springer Publishing, Star, Star chart, Stereographic projection, Surveying, Synesius, Syriac language, TED (conference), Tetrabiblos, Theon of Alexandria, Torquetum, Triangulation, Tympan, Ulysse Nardin. Expand index (61 more) »
A Treatise on the Astrolabe
A Treatise on the Astrolabe is a medieval instruction manual on the astrolabe by Geoffrey Chaucer.
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Abd al-Rahman al-Sufi
'Abd al-Rahman al-Sufi (عبدالرحمن صوفی (December 7, 903 in Rey, Iran – May 25, 986 in Shiraz, Iran) was a Persian astronomer also known as 'Abd ar-Rahman as-Sufi, 'Abd al-Rahman Abu al-Husayn, 'Abdul Rahman Sufi, or 'Abdurrahman Sufi and, historically, in the West as Azophi and Azophi Arabus. The lunar crater Azophi and the minor planet 12621 Alsufi are named after him. Al-Sufi published his famous Book of Fixed Stars in 964, describing much of his work, both in textual descriptions and pictures. Al-Biruni reports that his work on the ecliptic was carried out in Shiraz. He lived at the Buyid court in Isfahan.
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Al-Battani
Abū ʿAbd Allāh Muḥammad ibn Jābir ibn Sinān al-Raqqī al-Ḥarrānī aṣ-Ṣābiʾ al-Battānī (Arabic: محمد بن جابر بن سنان البتاني) (Latinized as Albategnius, Albategni or Albatenius) (c. 858 – 929) was an Arab astronomer, astrologer, and mathematician.
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Al-Biruni
Abū Rayḥān Muḥammad ibn Aḥmad Al-Bīrūnī (Chorasmian/ابوریحان بیرونی Abū Rayḥān Bērōnī; New Persian: Abū Rayḥān Bīrūnī) (973–1050), known as Al-Biruni (البيروني) in English, was an IranianD.J. Boilot, "Al-Biruni (Beruni), Abu'l Rayhan Muhammad b. Ahmad", in Encyclopaedia of Islam (Leiden), New Ed., vol.1:1236–1238.
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Al-Nayrizi
Abū’l-‘Abbās al-Faḍl ibn Ḥātim al-Nairīzī (أبو العباس الفضل بن حاتم النيريزي, Anaritius, Nazirius, 865–922) was a Persian mathematician and astronomer from Nayriz, Fars Province, Iran.
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Ali Ibn Ibrahim Qomi
Abu al-Hasan Ali Ibn Ibrāhim al-Qummi was a 10th century Shi'a commentator and jurist of Persian origin.
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Alidade
An alidade (archaic forms include alhidade, alhidad, alidad) or a turning board is a device that allows one to sight a distant object and use the line of sight to perform a task.
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Altitude
Altitude or height (sometimes known as depth) is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, atmospheric pressure, and many more).
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Antikythera mechanism
The Antikythera mechanism is an ancient Greek analogue computer and orrery used to predict astronomical positions and eclipses for calendar and astrological purposes decades in advance.
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Apollonius of Perga
Apollonius of Perga (Ἀπολλώνιος ὁ Περγαῖος; Apollonius Pergaeus; late 3rdearly 2nd centuries BC) was a Greek geometer and astronomer known for his theories on the topic of conic sections.
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Arabic
Arabic (العَرَبِيَّة) or (عَرَبِيّ) or) is a Central Semitic language that first emerged in Iron Age northwestern Arabia and is now the lingua franca of the Arab world. It is named after the Arabs, a term initially used to describe peoples living from Mesopotamia in the east to the Anti-Lebanon mountains in the west, in northwestern Arabia, and in the Sinai peninsula. Arabic is classified as a macrolanguage comprising 30 modern varieties, including its standard form, Modern Standard Arabic, which is derived from Classical Arabic. As the modern written language, Modern Standard Arabic is widely taught in schools and universities, and is used to varying degrees in workplaces, government, and the media. The two formal varieties are grouped together as Literary Arabic (fuṣḥā), which is the official language of 26 states and the liturgical language of Islam. Modern Standard Arabic largely follows the grammatical standards of Classical Arabic and uses much of the same vocabulary. However, it has discarded some grammatical constructions and vocabulary that no longer have any counterpart in the spoken varieties, and has adopted certain new constructions and vocabulary from the spoken varieties. Much of the new vocabulary is used to denote concepts that have arisen in the post-classical era, especially in modern times. During the Middle Ages, Literary Arabic was a major vehicle of culture in Europe, especially in science, mathematics and philosophy. As a result, many European languages have also borrowed many words from it. Arabic influence, mainly in vocabulary, is seen in European languages, mainly Spanish and to a lesser extent Portuguese, Valencian and Catalan, owing to both the proximity of Christian European and Muslim Arab civilizations and 800 years of Arabic culture and language in the Iberian Peninsula, referred to in Arabic as al-Andalus. Sicilian has about 500 Arabic words as result of Sicily being progressively conquered by Arabs from North Africa, from the mid 9th to mid 10th centuries. Many of these words relate to agriculture and related activities (Hull and Ruffino). Balkan languages, including Greek and Bulgarian, have also acquired a significant number of Arabic words through contact with Ottoman Turkish. Arabic has influenced many languages around the globe throughout its history. Some of the most influenced languages are Persian, Turkish, Spanish, Urdu, Kashmiri, Kurdish, Bosnian, Kazakh, Bengali, Hindi, Malay, Maldivian, Indonesian, Pashto, Punjabi, Tagalog, Sindhi, and Hausa, and some languages in parts of Africa. Conversely, Arabic has borrowed words from other languages, including Greek and Persian in medieval times, and contemporary European languages such as English and French in modern times. Classical Arabic is the liturgical language of 1.8 billion Muslims and Modern Standard Arabic is one of six official languages of the United Nations. All varieties of Arabic combined are spoken by perhaps as many as 422 million speakers (native and non-native) in the Arab world, making it the fifth most spoken language in the world. Arabic is written with the Arabic alphabet, which is an abjad script and is written from right to left, although the spoken varieties are sometimes written in ASCII Latin from left to right with no standardized orthography.
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Armillary sphere
An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (on the celestial sphere), consisting of a spherical framework of rings, centred on Earth or the Sun, that represent lines of celestial longitude and latitude and other astronomically important features, such as the ecliptic.
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Astrarium
An astrarium, also called a planetarium, is the mechanical representation of the cyclic nature of astronomical objects in one timepiece.
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AstroLabs
AstroLabs is a Dubai-based Google for Entrepreneurs (GFE) tech startup company co-working space and a member of the GFE Tech Hub Network.
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Astrology in medieval Islam
The medieval Muslims took a keen interest in the study of heavens: partly because they considered the celestial bodies to be divine, partly because the dwellers of desert-regions often travelled at night, and relied upon knowledge of the constellations for guidance in their journeys.
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Astronomical clock
An astronomical clock is a clock with special mechanisms and dials to display astronomical information, such as the relative positions of the sun, moon, zodiacal constellations, and sometimes major planets.
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Astronomical object
An astronomical object or celestial object is a naturally occurring physical entity, association, or structure that exists in the observable universe.
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Astronomy
Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.
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Astronomy in the medieval Islamic world
Islamic astronomy comprises the astronomical developments made in the Islamic world, particularly during the Islamic Golden Age (9th–13th centuries), and mostly written in the Arabic language.
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Azimuth
An azimuth (from the pl. form of the Arabic noun "السَّمْت" as-samt, meaning "the direction") is an angular measurement in a spherical coordinate system.
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Batch production
Batch production is a technique used in manufacturing, in which the object in question is created stage by stage over a series of workstations, and different batches of products are made.
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Byzantine Empire
The Byzantine Empire, also referred to as the Eastern Roman Empire and Byzantium, was the continuation of the Roman Empire in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinople (modern-day Istanbul, which had been founded as Byzantium).
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Calendar
A calendar is a system of organizing days for social, religious, commercial or administrative purposes.
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Canterbury Astrolabe Quadrant
The Canterbury Astrolabe Quadrant is a medieval astrolabe believed to date from 1388, and which was found in an archeological dig at the House of Agnes, a bed and breakfast hotel in Canterbury, Kent, England in 2005.
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Celestial sphere
In astronomy and navigation, the celestial sphere is an abstract sphere with an arbitrarily large radius concentric to Earth.
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Christian of Prachatice
Christian of Prachatice (Křišťan z Prachatice) (1360–1368, Prachatice, Kingdom of Bohemia – 4 September 1439, Prague, Kingdom of Bohemia) was a medieval Bohemian astronomer, mathematician and former Catholic priest who converted to the Hussite movement.
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Circle
A circle is a simple closed shape.
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Classical antiquity
Classical antiquity (also the classical era, classical period or classical age) is the period of cultural history between the 8th century BC and the 5th or 6th century AD centered on the Mediterranean Sea, comprising the interlocking civilizations of ancient Greece and ancient Rome, collectively known as the Greco-Roman world.
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Clime
The climes (singular clime; also clima, plural climata, from Greek κλίμα klima, plural κλίματα klimata, meaning "inclination" or "slope") in classical Greco-Roman geography and astronomy were the divisions of the inhabited portion of the spherical Earth by geographic latitude.
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Cosmolabe
The cosmolabe was an ancient astronomical instrument resembling the astrolabe, formerly used for measuring the angles between heavenly bodies.
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Creative Commons license
A Creative Commons (CC) license is one of several public copyright licenses that enable the free distribution of an otherwise copyrighted work.
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Declination
In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.
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Degree (angle)
A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle, defined so that a full rotation is 360 degrees.
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Dioptra
A dioptra (sometimes also named dioptre or diopter from διόπτρα) is a classical astronomical and surveying instrument, dating from the 3rd century BCE.
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Division of labour
The division of labour is the separation of tasks in any system so that participants may specialize.
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Ecliptic
The ecliptic is the circular path on the celestial sphere that the Sun follows over the course of a year; it is the basis of the ecliptic coordinate system.
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Equatorium
An equatorium (plural, equatoria) is an astronomical calculating instrument.
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Floruit
Floruit, abbreviated fl. (or occasionally, flor.), Latin for "he/she flourished", denotes a date or period during which a person was known to have been alive or active.
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Folk etymology
Folk etymology or reanalysis – sometimes called pseudo-etymology, popular etymology, or analogical reformation – is a change in a word or phrase resulting from the replacement of an unfamiliar form by a more familiar one.
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Geoffrey Chaucer
Geoffrey Chaucer (c. 1343 – 25 October 1400), known as the Father of English literature, is widely considered the greatest English poet of the Middle Ages.
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Geography and cartography in medieval Islam
Medieval Islamic geography was based on Hellenistic geography and reached its apex with Muhammad al-Idrisi in the 12th century.
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Georg Hartmann
Georg Hartmann (sometimes spelled Hartman; February 9, 1489 – April 9, 1564) was a German engineer, instrument maker, author, printer, humanist, churchman, and astronomer.
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Greek language
Greek (Modern Greek: ελληνικά, elliniká, "Greek", ελληνική γλώσσα, ellinikí glóssa, "Greek language") is an independent branch of the Indo-European family of languages, native to Greece and other parts of the Eastern Mediterranean and the Black Sea.
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Hellenistic period
The Hellenistic period covers the period of Mediterranean history between the death of Alexander the Great in 323 BC and the emergence of the Roman Empire as signified by the Battle of Actium in 31 BC and the subsequent conquest of Ptolemaic Egypt the following year.
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Hipparchus
Hipparchus of Nicaea (Ἵππαρχος, Hipparkhos) was a Greek astronomer, geographer, and mathematician.
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Horizon
The horizon or skyline is the apparent line that separates earth from sky, the line that divides all visible directions into two categories: those that intersect the Earth's surface, and those that do not.
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Hour
An hour (symbol: h; also abbreviated hr.) is a unit of time conventionally reckoned as of a day and scientifically reckoned as 3,599–3,601 seconds, depending on conditions.
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Hypatia
Hypatia (born 350–370; died 415 AD) was a Hellenistic Neoplatonist philosopher, astronomer, and mathematician, who lived in Alexandria, Egypt, then part of the Eastern Roman Empire.
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Inclinometer
An inclinometer or clinometer is an instrument used for measuring angles of slope (or tilt), elevation, or depression of an object with respect to gravity.
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Isfahan
Isfahan (Esfahān), historically also rendered in English as Ispahan, Sepahan, Esfahan or Hispahan, is the capital of Isfahan Province in Iran, located about south of Tehran.
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Islamic calendar
The Islamic, Muslim, or Hijri calendar (التقويم الهجري at-taqwīm al-hijrī) is a lunar calendar consisting of 12 months in a year of 354 or 355 days.
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Islamic Golden Age
The Islamic Golden Age is the era in the history of Islam, traditionally dated from the 8th century to the 14th century, during which much of the historically Islamic world was ruled by various caliphates, and science, economic development and cultural works flourished.
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Jainism
Jainism, traditionally known as Jain Dharma, is an ancient Indian religion.
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Johannes Stöffler
Johannes Stöffler (also Stöfler, Stoffler, Stoeffler; 10 December 1452 – 16 February 1531) was a German mathematician, astronomer, astrologer, priest, maker of astronomical instruments and professor at the University of Tübingen.
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John Philoponus
John Philoponus (Ἰωάννης ὁ Φιλόπονος; c. 490 – c. 570), also known as John the Grammarian or John of Alexandria, was an Alexandrian philologist, Aristotelian commentator and Christian theologian, author of a considerable number of philosophical treatises and theological works.
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Latitude
In geography, latitude is a geographic coordinate that specifies the north–south position of a point on the Earth's surface.
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List of inventions in the medieval Islamic world
The following is a list of inventions made in the medieval Islamic world, especially during the "Islamic Golden Age" (8th to 13th centuries), as well as the late medieval period, especially in the Emirate of Granada and the Ottoman Empire.
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Mahendra Sūri
Mahendra Sūri is the 14th century Jain astronomer who wrote the Yantraraja, the first Indian treatise on the astrolabe.
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Mariner's astrolabe
The mariner's astrolabe, also called sea astrolabe, was an inclinometer used to determine the latitude of a ship at sea by measuring the sun's noon altitude (declination) or the meridian altitude of a star of known declination.
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Marshall Islands stick chart
Stick charts were made and used by the Marshallese to navigate the Pacific Ocean by canoe off the coast of the Marshall Islands.
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Mashallah ibn Athari
Masha'Allah ibn Atharī (c.740–815 CE) was an eighth-century Persian Jewish astrologer and astronomer from the city of Basra (located in Iraq) who became the leading astrologer of the late 8th century.
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Mathematical instrument
A mathematical instrument is a tool or device used in the study or practice of mathematics.
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Mathematics in medieval Islam
Mathematics during the Golden Age of Islam, especially during the 9th and 10th centuries, was built on Greek mathematics (Euclid, Archimedes, Apollonius) and Indian mathematics (Aryabhata, Brahmagupta).
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Mecca
Mecca or Makkah (مكة is a city in the Hejazi region of the Arabian Peninsula, and the plain of Tihamah in Saudi Arabia, and is also the capital and administrative headquarters of the Makkah Region. The city is located inland from Jeddah in a narrow valley at a height of above sea level, and south of Medina. Its resident population in 2012 was roughly 2 million, although visitors more than triple this number every year during the Ḥajj (حَـجّ, "Pilgrimage") period held in the twelfth Muslim lunar month of Dhūl-Ḥijjah (ذُو الْـحِـجَّـة). As the birthplace of Muhammad, and the site of Muhammad's first revelation of the Quran (specifically, a cave from Mecca), Mecca is regarded as the holiest city in the religion of Islam and a pilgrimage to it known as the Hajj is obligatory for all able Muslims. Mecca is home to the Kaaba, by majority description Islam's holiest site, as well as being the direction of Muslim prayer. Mecca was long ruled by Muhammad's descendants, the sharifs, acting either as independent rulers or as vassals to larger polities. It was conquered by Ibn Saud in 1925. In its modern period, Mecca has seen tremendous expansion in size and infrastructure, home to structures such as the Abraj Al Bait, also known as the Makkah Royal Clock Tower Hotel, the world's fourth tallest building and the building with the third largest amount of floor area. During this expansion, Mecca has lost some historical structures and archaeological sites, such as the Ajyad Fortress. Today, more than 15 million Muslims visit Mecca annually, including several million during the few days of the Hajj. As a result, Mecca has become one of the most cosmopolitan cities in the Muslim world,Fattah, Hassan M., The New York Times (20 January 2005). even though non-Muslims are prohibited from entering the city.
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Middle Ages
In the history of Europe, the Middle Ages (or Medieval Period) lasted from the 5th to the 15th century.
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Muḥammad ibn Ibrāhīm al-Fazārī
Muhammad ibn Ibrahim al-Fazari (died 796 or 806) was a Muslim philosopher, mathematician and astronomer.
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Muhammad ibn Musa al-Khwarizmi
There is some confusion in the literature on whether al-Khwārizmī's full name is ابو عبد الله محمد بن موسى الخوارزمي or ابو جعفر محمد بن موسی الخوارزمی.
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National Maritime Museum
The National Maritime Museum (NMM) in Greenwich, London, is the leading maritime museum of the United Kingdom and may be the largest museum of its kind in the world.
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Navigator
A navigator is the person on board a ship or aircraft responsible for its navigation.
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Nocturnal (instrument)
A nocturnal is an instrument used to determine the local time based on the relative positions of two or more stars in the night sky.
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Orbital inclination
Orbital inclination measures the tilt of an object's orbit around a celestial body.
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Orrery
An orrery is a mechanical model of the solar system that illustrates or predicts the relative positions and motions of the planets and moons, usually according to the heliocentric model.
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Oxford English Dictionary
The Oxford English Dictionary (OED) is the main historical dictionary of the English language, published by the Oxford University Press.
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OxfordDictionaries.com
OxfordDictionaries.com, originally titled Oxford Dictionaries Online (ODO) and rebranded Oxford Living Dictionaries in 2017, is an online dictionary produced by the Oxford University Press (OUP) publishing house, a department of the University of Oxford, which also publishes a number of print dictionaries, among other works.
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Paris
Paris is the capital and most populous city of France, with an area of and a population of 2,206,488.
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Petrus Peregrinus de Maricourt
Petrus Peregrinus de Maricourt (Latin), Pierre Pelerin de Maricourt (French), or Peter Peregrinus of Maricourt (fl. 1269), was a 13th-century French scholar who conducted experiments on magnetism and wrote the first extant treatise describing the properties of magnets.
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Philippe Danfrie
Philippe Danfrie the elder (about 1532 in Cornouaille in Brittany - 1606 in Paris), was a designer and maker of mathematical instruments in metal and paper, as well as a type-cutter, engraver, minter of coins and medals, publisher and author.
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Planetarium
A planetarium (plural planetaria or planetariums) is a theatre built primarily for presenting educational and entertaining shows about astronomy and the night sky, or for training in celestial navigation.
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Planisphere
In astronomy, a planisphere is a star chart analog computing instrument in the form of two adjustable disks that rotate on a common pivot.
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Plato Tiburtinus
Plato Tiburtinus (Plato Tiburtinus, "Plato of Tivoli"; fl. 12th century) was a 12th-century Italian mathematician, astronomer and translator who lived in Barcelona from 1116 to 1138.
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Pointer (rod)
A pointer or pointing stick is a solid rod used to point manually, in the form of a stick, but always finished off or artificially produced.
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Pope Sylvester II
Pope Sylvester II or Silvester II (– 12 May 1003) was Pope from 2 April 999 to his death in 1003.
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Prague astronomical clock
The Prague astronomical clock, or Prague orloj (Pražský orloj), is a medieval astronomical clock located in Prague, the capital of the Czech Republic.
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Prince Henry the Navigator
Infante D. Henrique of Portugal, Duke of Viseu (4 March 1394 – 13 November 1460), better known as Prince Henry the Navigator (Infante Dom Henrique, o Navegador), was a central figure in the early days of the Portuguese Empire and in the 15th-century European maritime discoveries and maritime expansion.
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Princeton University Press
Princeton University Press is an independent publisher with close connections to Princeton University.
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Ptolemy
Claudius Ptolemy (Κλαύδιος Πτολεμαῖος, Klaúdios Ptolemaîos; Claudius Ptolemaeus) was a Greco-Roman mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology.
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Qibla
The Qibla (قِـبْـلَـة, "Direction", also transliterated as Qiblah, Qibleh, Kiblah, Kıble or Kibla), is the direction that should be faced when a Muslim prays during Ṣalāṫ (صَـلَاة).
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Quadrivium
The quadrivium (plural: quadrivia) is the four subjects, or arts, taught after teaching the trivium.
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Renaissance
The Renaissance is a period in European history, covering the span between the 14th and 17th centuries.
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Richard N. Frye
Richard Nelson Frye (January 10, 1920 – March 27, 2014) was an American scholar of Iranian and Central Asian Studies, and Aga Khan Professor Emeritus of Iranian Studies at Harvard University.
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Richard of Wallingford
Richard of Wallingford (1292–1336) was an English mathematician, astronomer, horologist, and cleric who made major contributions to astronomy and horology while serving as abbot of St Albans Abbey in Hertfordshire.
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Ruler
A ruler, sometimes called a rule or line gauge, is a device with equally spaced markings along its length, used in geometry, technical drawing, engineering and building to measure distances or to rule straight lines.
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Salah
Salah ("worship",; pl.; also salat), or namāz (نَماز) in some languages, is one of the Five Pillars in the faith of Islam and an obligatory religious duty for every Muslim.
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Severus Sebokht
Severus Sebokht (ܣܘܪܘܣ ܣܝܒܘܟܬ), also Seboukt of Nisibis, was a Syrian scholar and bishop who was born in Nisibis, Syria in 575 and died in 667.
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Sextant (astronomical)
Sextants for astronomical observations were devices depicting a sixth of a circle, used primarily for measuring the positions of stars.
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Sharaf al-Dīn al-Ṭūsī
(c. 1135 – c. 1213) was an Iranian mathematician and astronomer of the Islamic Golden Age (during the Middle Ages).
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Sky
The sky (or celestial dome) is everything that lies above the surface of the Earth, including the atmosphere and outer space.
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Springer Publishing
Springer Publishing is an American publishing company of academic journals and books, focusing on the fields of nursing, gerontology, psychology, social work, counseling, public health, and rehabilitation (neuropsychology).
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Star
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
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Star chart
A star chart or star map, also called a sky chart or sky map, is a map of the night sky.
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Stereographic projection
In geometry, the stereographic projection is a particular mapping (function) that projects a sphere onto a plane.
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Surveying
Surveying or land surveying is the technique, profession, and science of determining the terrestrial or three-dimensional positions of points and the distances and angles between them.
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Synesius
Synesius (Συνέσιος; c. 373 – c. 414), a Greek bishop of Ptolemais in the Libyan Pentapolis after 410, was born of wealthy parents who claimed descent from Spartan kings, at Balagrae (now Bayda, Libya) near Cyrene between 370 and 375.
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Syriac language
Syriac (ܠܫܢܐ ܣܘܪܝܝܐ), also known as Syriac Aramaic or Classical Syriac, is a dialect of Middle Aramaic.
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TED (conference)
TED Conferences, LLC (Technology, Entertainment, Design) is a media organization that posts talks online for free distribution, under the slogan "ideas worth spreading".
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Tetrabiblos
Tetrabiblos (Τετράβιβλος) 'four books', also known in Greek as Apotelesmatiká (Ἀποτελεσματικά) "Effects", and in Latin as Quadripartitum "Four Parts", is a text on the philosophy and practice of astrology, written in the 2nd century AD by the Alexandrian scholar Claudius Ptolemy (AD 90– AD 168).
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Theon of Alexandria
Theon of Alexandria (Θέων ὁ Ἀλεξανδρεύς; 335 – c. 405) was a Greek scholar and mathematician who lived in Alexandria, Egypt.
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Torquetum
The torquetum or turquet is a medieval astronomical instrument designed to take and convert measurements made in three sets of coordinates: Horizon, equatorial, and ecliptic.
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Triangulation
In trigonometry and geometry, triangulation is the process of determining the location of a point by forming triangles to it from known points.
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Tympan
Tympan means skin, and is used in a variety of technical meanings.
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Ulysse Nardin
Ulysse Nardin is a luxury Swiss watch manufacturer founded in 1846 in Le Locle, Switzerland, which has remained in continuous production since.
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Redirects here:
Astrolab, Astrolabes, Astrolabist, Astrolabium, Astrolobe, Plane astrolabe.
References
[1] https://en.wikipedia.org/wiki/Astrolabe
