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Copernican Revolution
The term "Copernican Revolution" was coined by the German philosopher Immanuel Kant in his 1781 work ''Critique of Pure Reason''. It was the paradigm shift from the Ptolemaic model of the heavens, which described the cosmos as having Earth stationary at the center of the universe, to the heliocentric model with the Sun at the center of the Solar System. This revolution consisted of two phases; the first being extremely mathematical in nature and beginning with the 1543 publication of Nicolaus Copernicus’s ''De revolutionibus orbium coelestium'', and the second phase starting in 1610 with the publication of a pamphlet by Galileo. Contributions to the "revolution" continued until finally ending with Isaac Newton's 1687 work . Heliocentrism Before Copernicus The "Copernican Revolution" is named for Nicolaus Copernicus, whose '' Commentariolus'', written before 1514, was the first explicit presentation of the heliocentric model in Renaissance scholarship. The idea of helioce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apparent Retrograde Motion
Apparent retrograde motion is the apparent motion of a planet in a direction opposite to that of other bodies within its system, as observed from a particular vantage point. Direct motion or prograde motion is motion in the same direction as other bodies. While the terms ''direct'' and ''prograde'' are equivalent in this context, the former is the traditional term in astronomy. The earliest recorded use of ''prograde'' was in the early 18th century, although the term is now less common. Etymology and history The term ''retrograde'' is from the Latin word – "backward-step", the affix meaning "backwards" and "step". ''Retrograde'' is most commonly an adjective used to describe the path of a planet as it travels through the night sky, with respect to the zodiac, stars, and other bodies of the celestial canopy. In this context, the term refers to planets, as they appear from Earth, stopping briefly and reversing direction at certain times, though in reality, of course, we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Almagest
The ''Almagest'' ( ) is a 2nd-century Greek mathematics, mathematical and Greek astronomy, astronomical treatise on the apparent motions of the stars and planetary paths, written by Ptolemy, Claudius Ptolemy ( ) in Koine Greek. One of the most influential scientific texts in history, it canonized a geocentric model of the Universe that was accepted for more than 1,200 years from its origin in Hellenistic Roman-era Alexandria, Alexandria, in the medieval Byzantine and Islamic Golden Age, Islamic worlds, and in Western Europe through the Middle Ages and early Renaissance until Copernicus. It is also a key source of information about ancient Greek astronomy. Ptolemy set up a public inscription at Canopus, Egypt, in 147 or 148. Norman T. Hamilton found that the version of Ptolemy's models set out in the ''Canopic Inscription'' was earlier than the version in the ''Almagest''. Hence the ''Almagest'' could not have been completed before about 150, a quarter-century after Ptolemy began ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nasir Al-Din Al-Tusi
Muḥammad ibn Muḥammad ibn al-Ḥasan al-Ṭūsī (1201 – 1274), also known as Naṣīr al-Dīn al-Ṭūsī (; ) or simply as (al-)Tusi, was a Persians, Persian polymath, architect, Early Islamic philosophy, philosopher, Islamic medicine, physician, Islamic science, scientist, and kalam, theologian. Nasir al-Din al-Tusi was a well published author, writing on subjects of math, engineering, prose, and mysticism. Additionally, al-Tusi made several scientific advancements. In astronomy, al-Tusi created very accurate tables of planetary motion, an updated planetary model, and critiques of Ptolemaic astronomy. He also made strides in logic, mathematics but especially trigonometry, biology, and chemistry. Nasir al-Din al-Tusi left behind a great legacy as well. Tusi is widely regarded as one of the greatest scientists of medieval Islam, since he is often considered the creator of trigonometry as a mathematical discipline in its own right. The Muslim scholar Ibn Khaldun (1332–1406) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Al-Urdi
Al-Urdi (full name: Moayad Al-Din Al-Urdi Al-Amiri Al-Dimashqi) () (d. 1266) was a medieval Syrian Arab astronomer and geometer. Born circa 1200, presumably (from the nisba ''al‐ʿUrḍī'') in the village of ''ʿUrḍ'' in the Syrian desert between Palmyra and Resafa, he moved to Damascus at some point before 1239, where he worked as an engineer and teacher of geometry, and built instruments for al-Malik al-Mansur of Hims. In 1259 he moved to Maragha in northwestern Iran, after being asked by Nasir al-Din al-Tusi to help establish the Maragha observatory under the patronage of Hulagu.PDF version Al-Urdi's most notable works are ''Risālat al-Raṣd'', a treatise on observational instruments, and ''Kitāb al-Hayʾa'' (كتاب الهيئة), a work on theoretical astronomy. His influence can be seen on Bar Hebraeus and Qutb al-Din al-Shirazi, in addition to being quoted by Ibn al-Shatir. Al-Urdi contributed to the construction of the observatory outside of the city, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maragheh Observatory
The Maragheh observatory (Persian language, Persian: رصدخانه مراغه), also spelled Maragha, Maragah, Marageh, and Maraga, was an astronomical observatory established in the mid 13th century under the patronage of the Ilkhanid Hulagu and the directorship of Nasir al-Din al-Tusi, a Persian people, Persian scientist and astronomer. The observatory is located on the west side of Maragheh, which is situated in today's East Azerbaijan Province of Iran.Niri, J. S. (2017). Determine the function and design of architectural and astronomical ... Determine the Function and Design of Architectural and Astronomical Observatory Discovered in the Maragheh. Retrieved November 8, 2022, from https://www.researchgate.net/publication/349064264_Determine_the_Function_and_Design_of_Architectural_and_Astronomical_Observatory_Discovered_in_the_Maragheh It was considered one of the most advanced scientific institutions in Eurasia because it was a center for many groundbreaking calculations in mat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ilkhanate
The Ilkhanate or Il-khanate was a Mongol khanate founded in the southwestern territories of the Mongol Empire. It was ruled by the Il-Khans or Ilkhanids (), and known to the Mongols as ''Hülegü Ulus'' (). The Ilkhanid realm was officially known as the Land of Iran or simply Iran. It was established after Hulegu Khan, Hülegü, the son of Tolui and grandson of Genghis Khan, inherited the West Asian and Central Asian part of the Mongol Empire after his brother Möngke Khan died in 1259. The Ilkhanate's core territory was situated in what is now the countries of Iran, Azerbaijan, and Turkey. At its greatest extent, the Ilkhanate also included parts of modern Iraq, Syria, Armenia, Georgia (country), Georgia, Afghanistan, Turkmenistan, Pakistan, part of modern Dagestan, and part of modern Tajikistan. Later Ilkhanid rulers, beginning with Ghazan in 1295, converted to Islam. In the 1330s, the Ilkhanate was ravaged by the Black Death. The last ilkhan, Abu Sa'id Bahadur Khan, died in 133 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otto E
Otto is a masculine German given name and a surname. It originates as an Old High German short form (variants '' Audo'', '' Odo'', '' Udo'') of Germanic names beginning in ''aud-'', an element meaning "wealth, prosperity". The name is recorded from the 7th century ( Odo, son of Uro, courtier of Sigebert III). It was the name of three 10th-century German kings, the first of whom was Otto I the Great, the first Holy Roman Emperor, founder of the Ottonian dynasty. The Gothic form of the prefix was ''auda-'' (as in e.g. '' Audaþius''), the Anglo-Saxon form was ''ead-'' (as in e.g. '' Eadmund''), and the Old Norse form was '' auð-''. Due to Otto von Bismarck, the given name ''Otto'' was strongly associated with the German Empire in the later 19th century. It was comparatively frequently given in the United States (presumably in German American families) during the 1880s to 1890s, remaining in the top 100 most popular masculine given names in the US throughout 1880–1898, but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Averroes
Ibn Rushd (14 April 112611 December 1198), archaically Latinization of names, Latinized as Averroes, was an Arab Muslim polymath and Faqīh, jurist from Al-Andalus who wrote about many subjects, including philosophy, theology, medicine, astronomy, physics, psychology, mathematics, neurology, Islamic jurisprudence and Islamic law, law, and linguistics. The author of more than 100 books and treatises, his philosophical works include numerous commentaries on Aristotle, for which he was known in the Western world as ''The Commentator'' and ''Father of Rationalism''. Averroes was a strong proponent of Aristotelianism; he attempted to restore what he considered the original teachings of Aristotle and opposed the Neoplatonism, Neoplatonist tendencies of earlier Muslims, Muslim thinkers, such as al-Farabi and Avicenna. He also defended the pursuit of philosophy against criticism by Ash'ari theologians such as Al-Ghazali. Averroes argued that philosophy was permissible in Islam and eve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Averroism
Averroism, also known as Rushdism, was a school of medieval philosophy based on the application of the works of 12th-century Andalusian philosopher Averroes, (Ibn Rushd in Arabic; 1126–1198) a commentator on Aristotle, in 13th-century Latin Christian scholasticism and Islamic Golden Age. Latin translations of Averroes' work became widely available at the universities which were springing up in Western Europe in the 13th century, and were received by scholasticists such as Siger of Brabant and Boetius of Dacia, who examined Christian doctrines through reasoning and intellectual analysis. The term ''Averroist'' was coined by Thomas Aquinas in the restricted sense of the Averroists' " unity of the intellect" doctrine in his book ''De unitate intellectus contra Averroistas''.. Based on this, ''Averroism'' came to be near-synonymous with atheism in late medieval usage. As a historiographical category, ''Averroism'' was first defined by Ernest Renan in ''Averroès et l'averro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Scotus Eriugena
John Scotus Eriugena, also known as Johannes Scotus Erigena, John the Scot or John the Irish-born ( – c. 877), was an Irish Neoplatonist philosopher, theologian and poet of the Early Middle Ages. Bertrand Russell dubbed him "the most astonishing person of the ninth century". Russell, Bertrand. ''The History Of Western Philosophy'' The ''Stanford Encyclopedia of Philosophy'' states that he "is the most significant Irish intellectual of the early monastic period. He is generally recognized to be both the outstanding philosopher (in terms of originality) of the Carolingian era and of the whole period of Latin philosophy stretching from Boethius to Anselm". He wrote a number of works, but is best known today for having written ''De Divisione Naturae'' ("The Division of Nature"), or ''Periphyseon'', which has been called the "final achievement" of ancient philosophy, a work which "synthesizes the philosophical accomplishments of fifteen centuries". The principal concern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macrobius
Macrobius Ambrosius Theodosius, usually referred to as Macrobius (fl. AD 400), was a Roman provincial who lived during the early fifth century, during late antiquity, the period of time corresponding to the Later Roman Empire, and when Latin was as widespread as Greek among the elite. He is primarily known for his writings, which include the widely copied and read '' Commentarii in Somnium Scipionis'' ("Commentary on the Dream of Scipio") about '' Somnium Scipionis'', which was one of the most important sources for Neoplatonism in the Latin West during the Middle Ages; the ''Saturnalia'', a compendium of ancient Roman religious and antiquarian lore; and ''De differentiis et societatibus graeci latinique verbi'' ("On the Differences and Similarities of the Greek and Latin Verb"), which is now lost. He is the basis for the protagonist Manlius in Iain Pears' book '' The Dream of Scipio''. Name Macrobius's given name () is unrecorded as is his family name (). His recorded nam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Middle Ages
The Early Middle Ages (or early medieval period), sometimes controversially referred to as the Dark Ages (historiography), Dark Ages, is typically regarded by historians as lasting from the late 5th to the 10th century. They marked the start of the Middle Ages of History of Europe, European history, following the decline of the Roman Empire, decline of the Western Roman Empire, and preceding the High Middle Ages ( 11th to 14th centuries). The alternative term ''Late antiquity#Terminology, late antiquity'', for the early part of the period, emphasizes elements of continuity with the Roman Empire, while ''Early Middle Ages'' is used to emphasize developments characteristic of the earlier medieval period. The period saw a continuation of trends evident since late classical antiquity, including population decline, especially in urban centres, a decline of trade, Medieval Warm Period, a small rise in average temperatures in the North Atlantic region and Migration Period, increased m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
