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The Royal Observatory, Greenwich (formerly the Royal Greenwich Observatory or RGO), in London played a major role in the history of astronomy and navigation, and is best known as the location of the prime meridian. It is situated on a hill in Greenwich Park, overlooking the River Thames.<br/><br/> The observatory was commissioned in 1675 by King Charles II, with the foundation stone being laid on 10 August.
The French Academy of Sciences (French: Académie des sciences) is a learned society, founded in 1666 by Louis XIV at the suggestion of Jean-Baptiste Colbert, to encourage and protect the spirit of French scientific research. It was at the forefront of scientific developments in Europe in the 17th and 18th centuries, and is one of the earliest Academies of Sciences.
Shen Kuo (1031–1095), courtesy name Cunzhong and pseudonym Mengxi Weng, was a Han Chinese polymathic scientist and statesman of the Song dynasty (960–1279).<br/><br/> Excelling in many fields of study and statecraft, he was a mathematician, astronomer, meteorologist, geologist, zoologist, botanist, pharmacologist, agronomist, archaeologist, ethnographer, cartographer, encyclopedist, general, diplomat, hydraulic engineer, inventor, academy chancellor, finance minister, governmental state inspector, poet, and musician.<br/><br/> He was the head official for the Bureau of Astronomy in the Song court, as well as an Assistant Minister of Imperial Hospitality.
Johann Adam Schall von Bell, Chinese name Tang Ruowang (May 1, 1592 – August 15, 1666) was a German Jesuit and astronomer. He spent most of his life as a missionary in China and became an adviser to the Shunzhi Emperor of the Qing dynasty.
Ole Christensen Rømer (25 September 1644 – 19 September 1710) was a Danish astronomer who in 1676 made the first quantitative measurements of the speed of light.
Kiến An is an urban district (quận) of Hai Phong, the third largest city of Vietnam and northern Vietnam's most important seaport with its deep-water anchorage and large maritime facilities.<br/><br/> The city's name means 'coastal defense' and it is named 'The City of Red Flame Trees' because of the many Delonix regia planted throughout it.
Kiến An is an urban district (quận) of Hai Phong, the third largest city of Vietnam and northern Vietnam's most important seaport with its deep-water anchorage and large maritime facilities.<br/><br/> The city's name means 'coastal defense' and it is named 'The City of Red Flame Trees' because of the many Delonix regia planted throughout it.
The Jantar Mantar is a collection of architectural astronomical instruments, built in 1724 by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of thirteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Delhi is said to be the site of Indraprashta, capital of the Pandavas of the Indian epic Mahabharata. Excavations have unearthed shards of painted pottery dating from around 1000 BCE, though the earliest known architectural relics date from the Mauryan Period, about 2,300 years ago. Since that time the site has been continuously settled.<br/><br/> The city was ruled by the Hindu Rajputs between about 900 and 1206 CE, when it became the capital of the Delhi Sultanate. In the mid-seventeenth century the Mughal Emperor Shah Jahan (1628–1658) established Old Delhi in its present location, including most notably the Red Fort or Lal Qila. The Old City served as the capital of the Mughal Empire from 1638 onwards.<br/><br/> Delhi passed under British control in 1857 and became the capital of British India in 1911. In large scale rebuilding, parts of the Old City were demolished to provide room for a grand new city designed by Edward Lutyens. New Delhi became the capital of independent India in 1947.
The Jantar Mantar is a collection of architectural astronomical instruments, built in 1724 by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of thirteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Delhi is said to be the site of Indraprashta, capital of the Pandavas of the Indian epic Mahabharata. Excavations have unearthed shards of painted pottery dating from around 1000 BCE, though the earliest known architectural relics date from the Mauryan Period, about 2,300 years ago. Since that time the site has been continuously settled.<br/><br/> The city was ruled by the Hindu Rajputs between about 900 and 1206 CE, when it became the capital of the Delhi Sultanate. In the mid-seventeenth century the Mughal Emperor Shah Jahan (1628–1658) established Old Delhi in its present location, including most notably the Red Fort or Lal Qila. The Old City served as the capital of the Mughal Empire from 1638 onwards.<br/><br/> Delhi passed under British control in 1857 and became the capital of British India in 1911. In large scale rebuilding, parts of the Old City were demolished to provide room for a grand new city designed by Edward Lutyens. New Delhi became the capital of independent India in 1947.
The Jantar Mantar is a collection of architectural astronomical instruments, built in 1724 by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of thirteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Delhi is said to be the site of Indraprashta, capital of the Pandavas of the Indian epic Mahabharata. Excavations have unearthed shards of painted pottery dating from around 1000 BCE, though the earliest known architectural relics date from the Mauryan Period, about 2,300 years ago. Since that time the site has been continuously settled.<br/><br/> The city was ruled by the Hindu Rajputs between about 900 and 1206 CE, when it became the capital of the Delhi Sultanate. In the mid-seventeenth century the Mughal Emperor Shah Jahan (1628–1658) established Old Delhi in its present location, including most notably the Red Fort or Lal Qila. The Old City served as the capital of the Mughal Empire from 1638 onwards.<br/><br/> Delhi passed under British control in 1857 and became the capital of British India in 1911. In large scale rebuilding, parts of the Old City were demolished to provide room for a grand new city designed by Edward Lutyens. New Delhi became the capital of independent India in 1947.
The Jantar Mantar is a collection of architectural astronomical instruments, built in 1724 by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of thirteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Delhi is said to be the site of Indraprashta, capital of the Pandavas of the Indian epic Mahabharata. Excavations have unearthed shards of painted pottery dating from around 1000 BCE, though the earliest known architectural relics date from the Mauryan Period, about 2,300 years ago. Since that time the site has been continuously settled.<br/><br/> The city was ruled by the Hindu Rajputs between about 900 and 1206 CE, when it became the capital of the Delhi Sultanate. In the mid-seventeenth century the Mughal Emperor Shah Jahan (1628–1658) established Old Delhi in its present location, including most notably the Red Fort or Lal Qila. The Old City served as the capital of the Mughal Empire from 1638 onwards.<br/><br/> Delhi passed under British control in 1857 and became the capital of British India in 1911. In large scale rebuilding, parts of the Old City were demolished to provide room for a grand new city designed by Edward Lutyens. New Delhi became the capital of independent India in 1947.
The Jantar Mantar is a collection of architectural astronomical instruments, built in 1724 by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of thirteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Delhi is said to be the site of Indraprashta, capital of the Pandavas of the Indian epic Mahabharata. Excavations have unearthed shards of painted pottery dating from around 1000 BCE, though the earliest known architectural relics date from the Mauryan Period, about 2,300 years ago. Since that time the site has been continuously settled.<br/><br/> The city was ruled by the Hindu Rajputs between about 900 and 1206 CE, when it became the capital of the Delhi Sultanate. In the mid-seventeenth century the Mughal Emperor Shah Jahan (1628–1658) established Old Delhi in its present location, including most notably the Red Fort or Lal Qila. The Old City served as the capital of the Mughal Empire from 1638 onwards.<br/><br/> Delhi passed under British control in 1857 and became the capital of British India in 1911. In large scale rebuilding, parts of the Old City were demolished to provide room for a grand new city designed by Edward Lutyens. New Delhi became the capital of independent India in 1947.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (in the celestial sphere), consisting of a spherical framework of rings, centred on Earth, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic. As such, it differs from a celestial globe, which is a smooth sphere whose principal purpose is to map the constellations.<br/><br/> Beijing's Ancient Observatory was built in 1442 during the Ming Dynasty and is one of the world's oldest. It served the Ming and Qing astronomers in their star-gazing reports for the Emperor. As he was considered the Son of Heaven, the movements of the heavenly bodies were an important affair. Another function was to assist sea navigation, with Muslim scholars recruited for their expertise in the area.
A quadrant is an instrument that is used to measure angles up to 90°. It was originally proposed by Ptolemy as a better kind of astrolabe. Several different variations of the instrument were later produced by medieval Muslim astronomers.<br/><br/> Beijing's Ancient Observatory was built in 1442 during the Ming Dynasty and is one of the world's oldest. It served the Ming and Qing astronomers in their star-gazing reports for the Emperor. As he was considered the Son of Heaven, the movements of the heavenly bodies were an important affair. Another function was to assist sea navigation, with Muslim scholars recruited for their expertise in the area.
Celestial globes show the apparent positions of the stars in the sky. They omit the Sun, Moon and planets because the positions of these bodies vary relative to those of the stars, but the ecliptic, along which the Sun moves, is indicated.<br/><br/> Beijing's Ancient Observatory was built in 1442 during the Ming Dynasty and is one of the world's oldest. It served the Ming and Qing astronomers in their star-gazing reports for the Emperor. As he was considered the Son of Heaven, the movements of the heavenly bodies were an important affair. Another function was to assist sea navigation, with Muslim scholars recruited for their expertise in the area.
An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (in the celestial sphere), consisting of a spherical framework of rings, centred on Earth, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic. As such, it differs from a celestial globe, which is a smooth sphere whose principal purpose is to map the constellations.<br/><br/> Beijing's Ancient Observatory was built in 1442 during the Ming Dynasty and is one of the world's oldest. It served the Ming and Qing astronomers in their star-gazing reports for the Emperor. As he was considered the Son of Heaven, the movements of the heavenly bodies were an important affair. Another function was to assist sea navigation, with Muslim scholars recruited for their expertise in the area.
An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (in the celestial sphere), consisting of a spherical framework of rings, centred on Earth, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic. As such, it differs from a celestial globe, which is a smooth sphere whose principal purpose is to map the constellations.<br/><br/> Beijing's Ancient Observatory was built in 1442 during the Ming Dynasty and is one of the world's oldest. It served the Ming and Qing astronomers in their star-gazing reports for the Emperor. As he was considered the Son of Heaven, the movements of the heavenly bodies were an important affair. Another function was to assist sea navigation, with Muslim scholars recruited for their expertise in the area.
Taqi al-Din Muhammad ibn Ma'ruf al-Shami al-Asadi (Arabic: تقي الدين محمد بن معروف الشامي, Modern Turkish: Takiyuddin) (1526–1585) was an Ottoman Turkish Muslim polymath. He was the author of more than 90 books on a wide variety of subjects, including astronomy, clocks, engineering, mathematics, mechanics, optics and natural philosophy.<br/><br/> Taqi al-Din's method of finding coordinates of stars was reportedly more precise from his contemporary Tycho Brahe and Nicolas Copernicus. Brahe is thought to be aware of Taqi al-Din's work.
The Jantar Mantar is a collection of architectural astronomical instruments, built in 1724 by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of thirteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Delhi is said to be the site of Indraprashta, capital of the Pandavas of the Indian epic Mahabharata. Excavations have unearthed shards of painted pottery dating from around 1000 BCE, though the earliest known architectural relics date from the Mauryan Period, about 2,300 years ago. Since that time the site has been continuously settled.<br/><br/> The city was ruled by the Hindu Rajputs between about 900 and 1206 CE, when it became the capital of the Delhi Sultanate. In the mid-seventeenth century the Mughal Emperor Shah Jahan (1628–1658) established Old Delhi in its present location, including most notably the Red Fort or Lal Qila. The Old City served as the capital of the Mughal Empire from 1638 onwards.<br/><br/> Delhi passed under British control in 1857 and became the capital of British India in 1911. In large scale rebuilding, parts of the Old City were demolished to provide room for a grand new city designed by Edward Lutyens. New Delhi became the capital of independent India in 1947.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
The Jantar Mantar is a collection of architectural astronomical instruments, built by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of fourteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Jaipur is the capital and largest city of the Indian state of Rajasthan. It was founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, after whom the city was named. The city today has a population of 3.1 million. Jaipur is known as the Pink City of India.<br/><br/> The city is remarkable among pre-modern Indian cities for the width and regularity of its streets which are laid out into six sectors separated by broad streets 34 m (111 ft) wide. The urban quarters are further divided by networks of gridded streets. Five quarters wrap around the east, south, and west sides of a central palace quarter, with a sixth quarter immediately to the east. The Palace quarter encloses the sprawling Hawa Mahal palace complex, formal gardens, and a small lake. Nahargarh Fort, which was the residence of the King Sawai Jai Singh II, crowns the hill in the northwest corner of the old city. The observatory, Jantar Mantar, is a World Heritage Site.
Father Ferdinand Verbiest (9 October 1623 – 28 January 1688) was a Flemish Jesuit missionary in China during the Qing dynasty. He was born in Pittem near Tielt in Flanders, later part of the modern state of Belgium. He was known as Nan Huairen (南懷仁) in Chinese.<br/><br/> He was an accomplished mathematician and astronomer and proved to the court of the Kangxi Emperor that European astronomy was more accurate than Chinese astronomy. He then corrected the Chinese calendar and was later asked to rebuild and re-equip the Beijing Ancient Observatory, being given the role of Head of the Mathematical Board and Director of the Observatory.<br/><br/> He became close friends with the Kangxi Emperor, who frequently requested his teaching, in geometry, philosophy and music. Verbiest worked as a diplomat and cartographer, and also as a translator, because he spoke Latin, German, Dutch, Spanish, Hebrew, and Italian. He wrote more than thirty books.
The Jantar Mantar is a collection of architectural astronomical instruments, built in 1724 by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of thirteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Delhi is said to be the site of Indraprashta, capital of the Pandavas of the Indian epic Mahabharata. Excavations have unearthed shards of painted pottery dating from around 1000 BCE, though the earliest known architectural relics date from the Mauryan Period, about 2,300 years ago. Since that time the site has been continuously settled.<br/><br/> The city was ruled by the Hindu Rajputs between about 900 and 1206 CE, when it became the capital of the Delhi Sultanate. In the mid-seventeenth century the Mughal Emperor Shah Jahan (1628–1658) established Old Delhi in its present location, including most notably the Red Fort or Lal Qila. The Old City served as the capital of the Mughal Empire from 1638 onwards.<br/><br/> Delhi passed under British control in 1857 and became the capital of British India in 1911. In large scale rebuilding, parts of the Old City were demolished to provide room for a grand new city designed by Edward Lutyens. New Delhi became the capital of independent India in 1947.
The Jantar Mantar is a collection of architectural astronomical instruments, built in 1724 by Maharaja Sawai Jai Singh who was a Rajput king. The observatory consists of thirteen major geometric devices for measuring time, predicting eclipses, tracking stars' location as the earth orbits around the sun, ascertaining the declinations of planets, and determining the celestial altitudes and related ephemerides.<br/><br/> Delhi is said to be the site of Indraprashta, capital of the Pandavas of the Indian epic Mahabharata. Excavations have unearthed shards of painted pottery dating from around 1000 BCE, though the earliest known architectural relics date from the Mauryan Period, about 2,300 years ago. Since that time the site has been continuously settled.<br/><br/> The city was ruled by the Hindu Rajputs between about 900 and 1206 CE, when it became the capital of the Delhi Sultanate. In the mid-seventeenth century the Mughal Emperor Shah Jahan (1628–1658) established Old Delhi in its present location, including most notably the Red Fort or Lal Qila. The Old City served as the capital of the Mughal Empire from 1638 onwards.<br/><br/> Delhi passed under British control in 1857 and became the capital of British India in 1911. In large scale rebuilding, parts of the Old City were demolished to provide room for a grand new city designed by Edward Lutyens. New Delhi became the capital of independent India in 1947.
The period from the mid-8th century to the mid-13th century is considered the Islamic Golden Age. It was a time when Arabs and Muslims made great strides in the fields of science, engineering, education, poetry, philosophy, geography, trade, agriculture, the arts, economics, industry, law, literature, navigation, philosophy, sociology and technology. In the Islamic world, astronomy was studied fastidiously to calculate the direction of the Qibla and to fix the times for Salah, Muslim prayers, as well as to aid sailors and navigators.