1.
Mirza
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Mirza or Mirzā is a historical title of Persian origin, denoting the rank of a high nobleman or Prince. It is usually defined in English as a royal or imperial Prince of the Blood, today, Mirza is used as a name to identify patriarchal lineage to royal aristocracies of Eastern Europe, Central Asia, and the Indian Subcontinent. Historically, it was used as a title by and signified patriarchal lineage to the families of the Turkish Empire, Persia, Circassia, Shirvan, Mughals. It was also a title bestowed upon members of the highest aristocracies in Tatar states, under Catherine the Great, empress of Russia, the Mirzas gained equal rights with the Russian nobility due to their extreme wealth. In return, the Mirzas financed her Russo-Turkish war against the Ottoman Empire, abdul Mirza was given the title Prince Yusupov, and his descendant Prince Felix Yusupov married Princess Irina Alexandrovna of Russia, the only niece of Tsar Nicholas II. The word Mīrzā is derived from the Persian term ‘Amīrzāde which literally means child of the ‘Amīr or child of the ruler in Persian, ‘Amīrzād in turn consists of the Arabic title ‘Amīr, meaning commander and Prince, and the Persian suffix -zād, meaning birth or lineage. Due to vowel harmony in Turkic languages, the alternative pronunciation Morza is also used, the word Mirza means royalty in almost every old version of Persian, Arab, Caucasian, Turkish and Indian languages. Variant spellings in English include mirzya, miriza, mirize, mirze, morsey, mursay, murse, meirsa, mirzey, mursi, murze, the titles themselves were given by the Kings, Sultans and Emperors to their sons and grandsons, or even distant kins. Noblemen loyal to the kings also received this Title, although their usage differed, the title itself came from the title emir. Emir, meaning commander or Prince, -derived from the Semitic root Amr, originally simply meaning commander or leader, usually in reference to a group of people. It came to be used as a title of governors or rulers, usually in smaller states, the word entered English in 1595, from the French émir. Gasim Mirza Kavus Mirza Abu Bakr Mirza In the Indian Subcontinent and it was adopted as part of ones name, implying relationship to the Turk dynasties like the Mughal Dynasty. In the traditional naming sequence of the Indian royal families, the title can be placed both before the name and after it, such as Prince Mirza Mughal or Prince Kamran Mirza. Prince Khusrau Mirza was the grandson of Emperor Babur, son of Emperor Jahangir, Emperor Akbar Shah II was known as Prince Mirza Akbar before his coronation. Emperor Babur took the title of Padishah on 6 March 1508. Mirza Zahiruddin 1523–1530, first Mughal Emperor, Mirza Nasiruddin 1530–1539 & 1554–1555, second Mughal Emperor. Mirza Jalaluddin 1555–1605, third Mughal Emperor, Mirza Nuruddin 1605–1627, fourth Mughal Emperor. Mirza Khurram 1627–1658, fifth Mughal Emperor, Mirza Muhiuddin 1658–1707, sixth Mughal Emperor
2.
Samarkand
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Samarkand, alternatively Samarqand or Samarcand, is a city in modern-day Uzbekistan and is one of the oldest inhabited cities in Central Asia. Prospering from its location on the Silk Road between China and the Mediterranean, at times Samarkand was one of the greatest cities of Central Asia, by the time of the Achaemenid Empire of Persia, it was the capital of the Sogdian satrapy. The city was taken by Alexander the Great in 329 BC, the city was ruled by a succession of Iranian, Persian, and Turkic peoples until the Mongols under Genghis Khan conquered Samarkand in 1220. Today, Samarkand is the capital of Samarqand Region, and Uzbekistans second largest city, the city is noted for being an Islamic centre for scholarly study. In the 14th century it became the capital of the empire of Timur and is the site of his mausoleum, the Bibi-Khanym Mosque remains one of the citys most notable landmarks. The Registan was the ancient center of the city, the city has carefully preserved the traditions of ancient crafts, embroidery, gold embroidery, silk weaving, engraving on copper, ceramics, carving, and painting on wood. In 2001, UNESCO added the city to its World Heritage List as Samarkand – Crossroads of Cultures, the name probably originates in the Sogdian words asmara, stone, rock and kand, fort, town. Along with Bukhara, Samarkand is one of the oldest inhabited cities in Central Asia, archeological excavations held within the city limits as well as suburban areas unearthed evidence of human activity as early as 40,000 years old, in the late Paleolithic era. A group of Mesolithic era archeological sites were discovered at Sazagon-1, Zamichatosh, the Syob and Dargom canals, supplying the city and its suburbs with water, appeared around the 7th to 5th centuries BC. There is no evidence when Samarkand was founded. Researchers of the Institute of Archeology of Samarkand argue for the existence of the city between the 8th and 7th centuries BC, Samarkand has been one of the main centres of Sogdian civilization from its early days. By the time of the Achaemenid dynasty of Persia it had become the capital of the Sogdian satrapy, Alexander the Great conquered Samarkand in 329 BC. The city was known as Maracanda by the Greeks, written sources offer small clues as to the subsequent system of government. They tell of an Orepius who became ruler not from ancestors, while Samarkand suffered significant damage during Alexanders initial conquest, the city recovered rapidly and under the new Hellenic influence flourished. There were also major new construction techniques, oblong bricks were replaced with square ones and superior methods of masonry, Alexanders conquests introduced into Central Asia classical Greek culture, at least for a time the Greek models were followed closely by the local artisans. After the Kushan era the city declined, it did not really revive until the 5th century, Samarkand was conquered by the Sassanians around 260 AD. Under Sassanian rule, the became an essential site for Manichaeism. After the Hephtalites conquered Samarkand, they controlled it until the Göktürks, in an alliance with the Sassanid Persians, the Turks ruled over Samarkand until they were defeated by the Sassanids during the Göktürk–Persian Wars
3.
Timurid Empire
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The empire was founded by Timur, a warlord of Turco-Mongol lineage who established the empire between 1370 and his death in 1405. He envisioned himself as the restorer of the Mongol Empire of Genghis Khan. In the 16th century, Babur, a Timurid prince from Ferghana, invaded Kabulistan and established a kingdom there. Timur conquered large parts of Central Asia, primarily Transoxiana and Khorasan, from 1363 onwards with various alliances, acting officially in the name of Suurgatmish, the Chagatai khan, he subjugated Transoxania and Khwarazm in the years that followed. The western Chagatai khans were continually dominated by Timurid princes in the 15th and 16th centuries, Timur began a campaign westwards in 1380, invading the various successor states of the Ilkhanate. By 1389, he had removed the Kartids from Herat and advanced into mainland Persia where he enjoyed many successes and this included the capture of Isfahan in 1387, the removal of the Muzaffarids from Shiraz in 1393, and the expulsion of the Jalayirids from Baghdad. In 1394–95, he triumphed over the Golden Horde, following his campaign in Georgia. Tokhtamysh, the khan of the Golden Horde, was a rival to Timur in the region. He also subjugated Multan and Dipalpur in modern-day Pakistan in 1398, Timur gave the north Indian territories to a non-family member, Khizr Khan, whose Sayyid dynasty replaced the defeated Tughlaq dynasty of the Sultanate of Delhi. Delhi became a vassal of the Timurids but obtained independence in the following the death of Timur. In 1400–1401 he conquered Aleppo, Damascus and eastern Anatolia, in 1401 he destroyed Baghdad and this made Timur the most preeminent Muslim ruler of the time, as the Ottoman Empire plunged into civil war. Meanwhile, he transformed Samarkand into a capital and seat of his realm. Timur appointed his sons and grandsons to the governorships of the different parts of his empire. After his death in 1405, the family fell into disputes and civil wars. Due to the fact that the Persian cities were desolated by wars, the cost of Timurs conquests amount to the deaths of possibly 17 million people. Shahrukh Mirza, fourth ruler of the Timurids, dealt with Kara Koyunlu, but, Jahan Shah drove the Timurids to eastern Iran after 1447 and also briefly occupied Herat in 1458. After the death of Jahan Shah, Uzun Hasan, bey of the Ak Koyunlu, by 1500, the divided and wartorn Timurid Empire had lost control of most of its territory, and in the following years was effectively pushed back on all fronts. Persia, the Caucasus, Mesopotamia, and Eastern Anatolia fell quickly to the Shiite Safavid dynasty, secured by Shah Ismail I in the following decade
4.
Iran
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Iran, also known as Persia, officially the Islamic Republic of Iran, is a sovereign state in Western Asia. Comprising a land area of 1,648,195 km2, it is the second-largest country in the Middle East, with 82.8 million inhabitants, Iran is the worlds 17th-most-populous country. It is the country with both a Caspian Sea and an Indian Ocean coastline. The countrys central location in Eurasia and Western Asia, and its proximity to the Strait of Hormuz, Tehran is the countrys capital and largest city, as well as its leading economic and cultural center. Iran is the site of to one of the worlds oldest civilizations, the area was first unified by the Iranian Medes in 625 BC, who became the dominant cultural and political power in the region. The empire collapsed in 330 BC following the conquests of Alexander the Great, under the Sassanid Dynasty, Iran again became one of the leading powers in the world for the next four centuries. Beginning in 633 AD, Arabs conquered Iran and largely displaced the indigenous faiths of Manichaeism and Zoroastrianism by Islam, Iran became a major contributor to the Islamic Golden Age that followed, producing many influential scientists, scholars, artists, and thinkers. During the 18th century, Iran reached its greatest territorial extent since the Sassanid Empire, through the late 18th and 19th centuries, a series of conflicts with Russia led to significant territorial losses and the erosion of sovereignty. Popular unrest culminated in the Persian Constitutional Revolution of 1906, which established a monarchy and the countrys first legislative body. Following a coup instigated by the U. K. Growing dissent against foreign influence and political repression led to the 1979 Revolution, Irans rich cultural legacy is reflected in part by its 21 UNESCO World Heritage Sites, the third-largest number in Asia and 11th-largest in the world. Iran is a member of the UN, ECO, NAM, OIC. Its political system is based on the 1979 Constitution which combines elements of a democracy with a theocracy governed by Islamic jurists under the concept of a Supreme Leadership. A multicultural country comprising numerous ethnic and linguistic groups, most inhabitants are Shia Muslims, the largest ethnic groups in Iran are the Persians, Azeris, Kurds and Lurs. Historically, Iran has been referred to as Persia by the West, due mainly to the writings of Greek historians who called Iran Persis, meaning land of the Persians. As the most extensive interactions the Ancient Greeks had with any outsider was with the Persians, however, Persis was originally referred to a region settled by Persians in the west shore of Lake Urmia, in the 9th century BC. The settlement was then shifted to the end of the Zagros Mountains. In 1935, Reza Shah requested the international community to refer to the country by its native name, opposition to the name change led to the reversal of the decision, and Professor Ehsan Yarshater, editor of Encyclopædia Iranica, propagated a move to use Persia and Iran interchangeably
5.
Gur-e-Amir
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The Gūr-i Amīr or Guri Amir, is a mausoleum of the Asian conqueror Timur in Samarkand, Uzbekistan. Gur-e Amir is Persian for Tomb of the King and this architectural complex with its azure dome contains the tombs of Tamerlane, his sons Shah Rukh and Miran Shah and grandsons Ulugh Beg and Muhammad Sultan. Also honoured with a place in the tomb is Timurs teacher Sayyid Baraka, the earliest part of the complex was built at the end of the 14th century by the orders of Muhammad Sultan. Now only the foundations of the madrasah and khanaka, the entrance portal, the construction of the mausoleum itself began in 1403 after the sudden death of Muhammad Sultan, Tamerlanes heir apparent and his beloved grandson, for whom it was intended. Timur had built himself a smaller tomb in Shahrisabz near his Ak-Saray palace, however, when Timur died in 1405 on campaign on his military expedition to China, the passes to Shahrisabz were snowed in, so he was buried here instead. Ulugh Beg, another grandson of Tamerlane, completed the work, during his reign the mausoleum became the family crypt of the Timurid Dynasty. The entrance portal to the Muhammad Sultan ensemble is decorated with carved bricks. All the extensions of Ulugh Beks time are attributed to the architect Muhammad ibn Mahmud from Isfahan, outwardly the Gur-e Amir Mausoleum is a one-cupola building. It is famous for its simplicity of construction and for its solemn monumentality of appearance and it is an octahedral building crowned by an azure fluted dome. The exterior decoration of the consists of the blue, light-blue and white tiles organized into geometrical. The dome is of a blue color with deep rosettes. Heavy ribbed fluting gives an amazing expressiveness to the cupola, during the reign of Ulugh Bek a doorway was made to provide an entrance into the mausoleum. Inwardly the mausoleum appears as a large, high chamber with deep niches at the sides, the lower part of the walls covered are by onyx slabs composed as one panel. Each of these slabs is decorated with refined paintings, above the panel there is a marble stalactite cornice. Large expanses of the walls are decorated with painted plaster, the arches, the ornate carved headstones in the inner room of the mausoleum merely indicate the location of the actual tombs in a crypt directly underneath the main chamber. Under Ulugh Beks government a solid block of green jade was placed over the grave of Tamerlane. Formerly this stone had been used at a place of worship in the Chinese emperors palace, next to Tamerlanes grave lie the marble tombstones of his sons Miran Shah and Shah Rukh and also of grandsons – Muhammad Sultan and Ulugh Bek. Tamerlanes spiritual teacher Mir Said Baraka, also rests here, unfortunately, since the end of 17th century Samarkand has suffered a long period of decline
6.
Timur
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Timur, historically known as Amir Timur and Tamerlane, was a Turco-Mongol conqueror and the founder of the Timurid Empire in Persia and Central Asia. He was also the first ruler in the Timurid dynasty, born into the Barlas confederation in Transoxiana on 9 April 1336, Timur gained control of the western Chagatai Khanate by 1370. From these conquests he founded the Timurid Empire, but this empire fragmented shortly after his death, according to John Joseph Saunders, Timurs background was Iranized and not steppe nomad. Timur envisioned the restoration of the Mongol Empire of Genghis Khan, in his formal correspondence Temur continued throughout his life to portray himself as the restorer of Chinggisid rights. He justified his Iranian, Mamluk, and Ottoman campaigns as a re-imposition of legitimate Mongol control over lands taken by usurpers, to legitimize his conquests, Timur relied on Islamic symbols and language, referred to himself as the Sword of Islam and patronized educational and religious institutions. He converted nearly all the Borjigin leaders to Islam during his lifetime, Temur, a non-Chinggisid, tried to build a double legitimacy based on his role as both guardian and restorer of the Mongol Empire. Timur also decisively defeated the Christian Knights Hospitaller at Smyrna, styling himself a ghazi, by the end of his reign, Timur had gained complete control over all the remnants of the Chagatai Khanate, Ilkhanate, and Golden Horde and even attempted to restore the Yuan dynasty. Timurs armies were inclusively multi-ethnic and were feared throughout Asia, Africa, scholars estimate that his military campaigns caused the deaths of 17 million people, amounting to about 5% of the world population. Timur is also recognized as a patron of art and architecture, as he interacted with Muslim intellectuals such as Ibn Khaldun. Timur was born in Transoxiana near the city of Kesh some 80 kilometres south of Samarkand and his father, Taraqai, was a minor noble of the Barlas, a Mongolian tribe that had been turkified in many aspects. According to Gérard Chaliand, Timur was a Muslim, and he saw himself as Genghis Khans heir, though not a Borjigid or a descendent of Genghis Khan, he clearly sought to invoke the legacy of Genghis Khans conquests during his lifetime. His name Temur means Iron in the Chaghatay language, Timurs mother-tongue, later Timurid dynastic histories claim that he was born on April 8,1336, but most sources from his lifetime give ages that are consistent with a birthdate in the late 1320s. At the age of eight or nine, Timur and his mother, in his childhood, Timur and a small band of followers raided travelers for goods, especially animals such as sheep, horses, and cattle. In around 1363, it is believed that Timur tried to steal a sheep from a shepherd but was shot by two arrows, one in his leg and another in his right hand, where he lost two fingers. Both injuries crippled him for life, some believe that Timur suffered his crippling injuries while serving as a mercenary to the khan of Sistan in Khorasan in what is today the Dashti Margo in southwest Afghanistan. Timurs injuries have given him the names of Timur the Lame, Timur was a Muslim, possibly belonging to the Naqshbandi school of Sufism, which was influential in Transoxiana. However, his official religious counsellor and adviser was the Hanafi scholar Abdu l-Jabbar Khwarazmi. In Tirmidh, he had come under the influence of his spiritual mentor Sayyid Baraka, Timur was known to hold Ali and the Ahl al-Bayt in high regard and has been noted by various scholars for his pro-Alid stance
7.
Islam
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Islam is an Abrahamic monotheistic religion which professes that there is only one and incomparable God and that Muhammad is the last messenger of God. It is the worlds second-largest religion and the major religion in the world, with over 1.7 billion followers or 23% of the global population. Islam teaches that God is merciful, all-powerful, and unique, and He has guided mankind through revealed scriptures, natural signs, and a line of prophets sealed by Muhammad. The primary scriptures of Islam are the Quran, viewed by Muslims as the word of God. Muslims believe that Islam is the original, complete and universal version of a faith that was revealed many times before through prophets including Adam, Noah, Abraham, Moses. As for the Quran, Muslims consider it to be the unaltered, certain religious rites and customs are observed by the Muslims in their family and social life, while social responsibilities to parents, relatives, and neighbors have also been defined. Besides, the Quran and the sunnah of Muhammad prescribe a comprehensive body of moral guidelines for Muslims to be followed in their personal, social, political, Islam began in the early 7th century. Originating in Mecca, it spread in the Arabian Peninsula. The expansion of the Muslim world involved various caliphates and empires, traders, most Muslims are of one of two denominations, Sunni or Shia. Islam is the dominant religion in the Middle East, North Africa, sizable Muslim communities are also found in Horn of Africa, Europe, China, Russia, Mainland Southeast Asia, Philippines, Northern Borneo, Caucasus and the Americas. Converts and immigrant communities are found in almost every part of the world, Islam is a verbal noun originating from the triliteral root s-l-m which forms a large class of words mostly relating to concepts of wholeness, submission, safeness and peace. In a religious context it means voluntary submission to God, Islām is the verbal noun of Form IV of the root, and means submission or surrender. Muslim, the word for an adherent of Islam, is the active participle of the verb form. The word sometimes has connotations in its various occurrences in the Quran. In some verses, there is stress on the quality of Islam as a state, Whomsoever God desires to guide. Other verses connect Islām and dīn, Today, I have perfected your religion for you, I have completed My blessing upon you, still others describe Islam as an action of returning to God—more than just a verbal affirmation of faith. In the Hadith of Gabriel, islām is presented as one part of a triad that also includes imān, Islam was historically called Muhammadanism in Anglophone societies. This term has fallen out of use and is said to be offensive because it suggests that a human being rather than God is central to Muslims religion
8.
Astronomer
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An astronomer is a scientist in the field of astronomy who concentrates their studies on a specific question or field outside of the scope of Earth. They look at stars, planets, moons, comets and galaxies, as well as other celestial objects — either in observational astronomy. Examples of topics or fields astronomers work on include, planetary science, solar astronomy, there are also related but distinct subjects like physical cosmology which studies the Universe as a whole. Astronomers usually fit into two types, Observational astronomers make direct observations of planets, stars and galaxies, and analyze the data, theoretical astronomers create and investigate models of things that cannot be observed. They use this data to create models or simulations to theorize how different celestial bodies work, there are further subcategories inside these two main branches of astronomy such as planetary astronomy, galactic astronomy or physical cosmology. Today, that distinction has disappeared and the terms astronomer. Professional astronomers are highly educated individuals who typically have a Ph. D. in physics or astronomy and are employed by research institutions or universities. They spend the majority of their time working on research, although quite often have other duties such as teaching, building instruments. The number of astronomers in the United States is actually quite small. The American Astronomical Society, which is the organization of professional astronomers in North America, has approximately 7,000 members. This number includes scientists from other such as physics, geology. The International Astronomical Union comprises almost 10,145 members from 70 different countries who are involved in research at the Ph. D. level. Before CCDs, photographic plates were a method of observation. Modern astronomers spend relatively little time at telescopes usually just a few weeks per year, analysis of observed phenomena, along with making predictions as to the causes of what they observe, takes the majority of observational astronomers time. Astronomers who serve as faculty spend much of their time teaching undergraduate and graduate classes, most universities also have outreach programs including public telescope time and sometimes planetariums as a public service to encourage interest in the field. Those who become astronomers usually have a background in maths, sciences. Taking courses that teach how to research, write and present papers are also invaluable, in college/university most astronomers get a Ph. D. in astronomy or physics. Keeping in mind how few there are it is understood that graduate schools in this field are very competitive
9.
Sultan
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Sultan is a noble title with several historical meanings. Originally, it was an Arabic abstract noun meaning strength, authority, rulership, derived from the verbal noun سلطة sulṭah, the dynasty and lands ruled by a sultan are referred to as a sultanate. A feminine form of sultan, used by Westerners, is Sultana or Sultanah, but Turkish and Ottoman Turkish also uses sultan for imperial lady, because Turkish grammar uses the same words for women and men. However, this styling misconstrues the roles of wives of sultans, in a similar usage, the wife of a German field marshal might be styled Frau Feldmarschall. The female leaders in Muslim history are known as sultanas. Special case in Brunei, the Queen Consort is known as Raja Isteri with suffix Pengiran Anak if the queen consort is a royal princess. Among those modern hereditary rulers who wish to emphasize their secular authority under the rule of law and these are generally secondary titles, either lofty poetry or with a message, e. g. g. Sultan ul-Mujahidin as champion of jihad, ghaznavid Sultanate Sultans of Great Seljuk Seljuk Sultanate of Rum Sultans of the Ottoman Empire, the Osmanli Elisu Sultanate and a few others. A Sultan ranked below a Khan and this usage underlines the Ottoman conception of sovereign power as family prerogative. Western tradition knows the Ottoman ruler as sultan, but Ottomans themselves used padişah or hünkar to refer to their ruler, the emperors formal title consisted of sultan together with khan. In formal address, the children were also entitled sultan, with imperial princes carrying the title before their given name. Example, Şehzade Sultan Mehmed and Mihrimah Sultan, son and daughter of Suleiman the Magnificent, henceforth, the mother of the reigning sultan was the only person of non imperial blood to carry the title sultan. In Kazakh Khanate a Sultan was a lord from the ruling dynasty elected by clans, the best of sultans was elected as khan by people at Kurultai. See ru, Казахские султаны In a number of states under Mongol or Turkic rule. These administrations were often decimal, using originally princely titles such as khan, malik, in the Persian empire, the rank of sultan was roughly equivalent to that of a modern-day captain in the West, socially in the fifth-rank class, styled Ali Jah
10.
Astronomy in the medieval Islamic world
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Islamic astronomy comprises the astronomical developments made in the Islamic world, particularly during the Islamic Golden Age, and mostly written in the Arabic language. These developments mostly took place in the Middle East, Central Asia, Al-Andalus, and North Africa and these included Greek, Sassanid, and Indian works in particular, which were translated and built upon. Islamic astronomy also had an influence on Chinese astronomy and Malian astronomy, a significant number of stars in the sky, such as Aldebaran, Altair and Deneb, and astronomical terms such as alidade, azimuth, and nadir, are still referred to by their Arabic names. A large corpus of literature from Islamic astronomy remains today, numbering approximately 10,000 manuscripts scattered throughout the world, even so, a reasonably accurate picture of Islamic activity in the field of astronomy can be reconstructed. These observations were based on the rising and setting of stars. Anwa continued to be developed after Islamization by the Arabs, where Islamic astronomers added mathematical methods to their empirical observations, according to David King, after the rise of Islam, the religious obligation to determine the qibla and prayer times inspired more progress in astronomy for centuries. The first astronomical texts that were translated into Arabic were of Indian and Persian origin, another text translated was the Zij al-Shah, a collection of astronomical tables compiled in Sasanid Persia over two centuries. Fragments of texts during this period indicate that Arabs adopted the function in place of the chords of arc used in Greek trigonometry. The House of Wisdom was an established in Baghdad under Abbasid caliph Al-Mamun in the early 9th century. From this time, independent investigation into the Ptolemaic system became possible, Astronomical research was greatly supported by the Abbasid caliph al-Mamun through The House of Wisdom. Baghdad and Damascus became the centers of such activity, the caliphs not only supported this work financially, but endowed the work with formal prestige. The first major Muslim work of astronomy was Zij al-Sindh by al-Khwarizmi in 830, the work contains tables for the movements of the sun, the moon and the five planets known at the time. The work is significant as it introduced Ptolemaic concepts into Islamic sciences and this work also marks the turning point in Islamic astronomy. Hitherto, Muslim astronomers had adopted a primarily research approach to the field, translating works of others, al-Khwarizmis work marked the beginning of nontraditional methods of study and calculations. In 850, al-Farghani wrote Kitab fi Jawani, the book primarily gave a summary of Ptolemic cosmography. However, it also corrected Ptolemy based on findings of earlier Arab astronomers, al-Farghani gave revised values for the obliquity of the ecliptic, the precessional movement of the apogees of the sun and the moon, and the circumference of the earth. The book was circulated through the Muslim world, and even translated into Latin. The period when a distinctive Islamic system of astronomy flourished, the period began as the Muslim astronomers began questioning the framework of the Ptolemaic system of astronomy
Ulugh Beg Observatory in Samarkand. In Ulugh Beg's time, these walls were lined with polished marble.
Media related to Ulugh Beg at Wikimedia Commons
Chisholm, Hugh, ed. (1911). "Ulugh Beg". Encyclopædia Britannica (11th ed.). Cambridge University Press.
Chisholm, Hugh, ed. (1911). "
