Map - Jantar Mantar, New Delhi (Jantar Mantar)

Jantar Mantar (Jantar Mantar)
Jantar Mantar is located in the modern city of New Delhi. “Jantar Mantar” it means “instruments for measuring the harmony of the heavens”. It consists of 13 architectural astronomy instruments. The site is one of five built by Maharaja Jai Singh II of Jaipur, from 1723 onwards, revising the calendar and astronomical tables. Jai Singh, born in 1688 into a royal Rajput family that ruled the regional kingdom, was born into an era of education that maintained a keen interest in astronomy. There is a plaque fixed on one of the structures in the Jantar Mantar observatory in New Delhi that was placed there in 1910 mistakenly dating the construction of the complex to the year 1710. Later research, though, suggests 1724 as the actual year of construction. Its height is 723 ft.

The primary purpose of the observatory was to compile astronomical tables, and to predict the times and movements of the sun, moon and planets. Some of these purposes nowadays would be classified as astronomy.

Completed in 1724, the Delhi Jantar Mantar had decayed considerably by 1857 uprising. The Ram Yantra, the Samrat Yantra, the Jai Prakash Yantra and the Misra Yantra are the distinct instruments of Jantar Mantar. The most famous of these structure, the Jaipur, had also deteriorated by the end of the nineteenth century until in 1901 Maharaja Ram Singh set out to restore the instrument.

Jantar Mantar located in New Delhi is built by Maharaja Jai Singh II of Jaipur in the year 1724. The maharaja built five observatories during his ruling time in the 18th century. Among these five the one in Delhi is the first to be built. The other four observatories are located in Ujjain, Mathura, Varanasi, and Jaipur.

The objective behind the construction of these observatories was to assemble astronomical data and to accurately predict the movement of the planets, moon, sun, etc. in the solar system. It was one of its kind at the time it was built. By the year 1867, when India was under the British Raj, the observatory had underwent considerable decay.

 
Map - Jantar Mantar (Jantar Mantar)
Country - India
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India, officially the Republic of India (Hindi: ), – "Official name: Republic of India."; – "Official name: Republic of India; Bharat Ganarajya (Hindi)"; – "Official name: Republic of India; Bharat."; – "Official name: English: Republic of India; Hindi:Bharat Ganarajya"; – "Official name: Republic of India"; – "Officially, Republic of India"; – "Official name: Republic of India"; – "India (Republic of India; Bharat Ganarajya)" is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it shares land borders with Pakistan to the west; China, Nepal, and Bhutan to the north; and Bangladesh and Myanmar to the east. In the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives; its Andaman and Nicobar Islands share a maritime border with Thailand, Myanmar, and Indonesia.

Modern humans arrived on the Indian subcontinent from Africa no later than 55,000 years ago. Their long occupation, initially in varying forms of isolation as hunter-gatherers, has made the region highly diverse, second only to Africa in human genetic diversity. Settled life emerged on the subcontinent in the western margins of the Indus river basin 9,000 years ago, evolving gradually into the Indus Valley Civilisation of the third millennium BCE. By, an archaic form of Sanskrit, an Indo-European language, had diffused into India from the northwest. (a) (b) (c), "In Punjab, a dry region with grasslands watered by five rivers (hence ‘panch’ and ‘ab’) draining the western Himalayas, one prehistoric culture left no material remains, but some of its ritual texts were preserved orally over the millennia. The culture is called Aryan, and evidence in its texts indicates that it spread slowly south-east, following the course of the Yamuna and Ganga Rivers. Its elite called itself Arya (pure) and distinguished themselves sharply from others. Aryans led kin groups organized as nomadic horse-herding tribes. Their ritual texts are called Vedas, composed in Sanskrit. Vedic Sanskrit is recorded only in hymns that were part of Vedic rituals to Aryan gods. To be Aryan apparently meant to belong to the elite among pastoral tribes. Texts that record Aryan culture are not precisely datable, but they seem to begin around 1200 BCE with four collections of Vedic hymns (Rg, Sama, Yajur, and Artharva)."
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  •  China 
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  •  Pakistan