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The Jantar Mantar
Jantar Mantar
is an equinoctial sundial, consisting a gigantic triangular gnomon with the hypotenuse parallel to the Earth's axis. On either side of the gnomon is a quadrant of a circle, parallel to the plane of the equator. The instrument is intended to measure the time of day, correct to half a second and declination of the Sun
Sun
and the other heavenly bodies. There are five Jantar Mantar
Jantar Mantar
monuments in India, of which the largest is in Jaipur
Jaipur
which features many instruments along with the world's largest stone sundial.[1] The Vrihat Samrat yantra is a sundial that can give the local time to an accuracy of 2 seconds.[2] It is a UNESCO World Heritage Site.

Contents

1 History 2 Name 3 See also 4 References 5 External links

History[edit] In the early 18th century, Maharaja
Maharaja
Jai Singh II
Jai Singh II
of Jaipur
Jaipur
constructed five Jantar Mantars in total, in New Delhi, Jaipur, Ujjain, Mathura and Varanasi; they were completed between 1724 and 1735. The jantars have evocative names like Samrat Yantra, Jai Prakash, Ram Yantra
Yantra
and Niyati Chakra; each of which are used to for various astronomical calculations. The primary purpose of the observatory was to compile astronomical tables, and to predict the times and movements of the sun, moon and planets.[3] List Of Instruments: Samrat Yantra Jai Prakash Yantra Disha Yantra Rama Yantra Chakra Yantra Rashiwalay Yantra Dingash Yantra Utaansh Yantra

The Sun
Sun
Dial at the Vedh Shala
Vedh Shala
in Ujjain

Name[edit] The name "Jantar Mantar" is at least 200 years old, finding a mention in an account from 1803.[4] However, the archives of Jaipur
Jaipur
State, such as accounts from 1735 and 1737–1738, do not use thisas Jantra, which in the spoken language is corrupted to Jantar.[4] The word Jantra is derived from yantra, instrument, while the suffix Mantar is derived from mantrana meaning consult or calculate.[4] The words jantar and 'mantar (or yantra and mantra) means calculation instrument. See also[edit]

Jantar Mantar
Jantar Mantar
in Jaipur, Rajasthan Jantar Mantar
Jantar Mantar
in New Delhi Jantar Mantar
Jantar Mantar
in Varanasi Jantar Mantar
Jantar Mantar
in Ujjain List of archaeoastronomical sites sorted by country Mantra Yantra

References[edit]

^ Smithsonian. Timelines of Science. Penguin. p. 136. ISBN 978-1465414342.  ^ pareek, Amit kumar pareek and Agam kumar. " Jantar Mantar
Jantar Mantar
Jaipur". amerjaipur.in. Retrieved 2016-01-01.  ^ Sankalp India
India
Foundation. Jantart Mantar: Get lost in space! (2008-07-22). ^ a b c Sharma, V‌irendra Nath (1995), Sawai Jai Singh and His Astronomy, Motilal Banarsidass Publishers Pvt. Ltd., pp. 98–99, ISBN 81-208-1256-5 

Anisha Shekhar Mukherji (2010), Jantar Mantar: Maharaja
Maharaja
Sawai Jai Singh's Observatory in Delhi, Ambi Knowledge Resource, ISBN 978-81-903591-1-5, retrieved 23 July 2013 

External links[edit]

Wikimedia Commons has media related to Jantar Mantar.

Jantar Mantar
Jantar Mantar
- The Astronomical Observatories of Jai Singh II, "a project initiated by Cornell University Professor of Art, Barry Perlus" Pictures with French text Jantar Mantar
Jantar Mantar
Jaipur
Jaipur
Timings, Entry Fee

v t e

Indian mathematics

Mathematicians

Ancient

Apastamba Baudhayana Katyayana Manava Pāṇini Pingala Yajnavalkya

Classical

Āryabhaṭa I Āryabhaṭa II Bhāskara I Bhāskara II Melpathur Narayana Bhattathiri Brahmadeva Brahmagupta Brihaddeshi Govindasvāmi Halayudha Jyeṣṭhadeva Kamalakara Mādhava of Saṅgamagrāma Mahāvīra Mahendra Sūri Munishvara Narayana Pandit Parameshvara Achyuta Pisharati Jagannatha Samrat Nilakantha Somayaji Śrīpati Sridhara Gangesha Upadhyaya Varāhamihira Sankara Variar Virasena

Modern

Shanti Swarup Bhatnagar Prize recipients in Mathematical Science

Treatises

Āryabhaṭīya Bakhshali manuscript Bijaganita Brāhmasphuṭasiddhānta Ganita Kaumudi Karanapaddhati Līlāvatī Lokavibhaga Paulisa Siddhanta Paitamaha Siddhanta Romaka Siddhanta Sadratnamala Siddhānta Shiromani Śulba Sūtras Surya Siddhanta Tantrasamgraha Vasishtha Siddhanta Veṇvāroha Yuktibhāṣā Yavanajataka

Centres

Kerala school of astronomy and mathematics Ujjain Jantar Mantar
Jantar Mantar
(Jaipur, Delhi)

Historians of mathematics

Bibhutibhushan Datta T. A. Sarasvati Amma A. A. Krishnaswami Ayyangar Sudhakara Dvivedi Radha Charan Gupta Kim Plofker K. V. Sarma Bapudeva Sastri Prabodh Chandra Sengupta

Translators

Walter Eugene Clark David Pingree

Other regions

Babylonian mathematics Chinese mathematics Greek mathematics Islamic mathematics European mathematics

Modern institutions

Indian Statistical Institute Chennai Mathematical Institute Institute of Mathematical Sciences, Chennai Indian Institute of Science Harish-Chandra Research Institute Bhaskaracharya Pratishthana Ramanujan Institute for Advanced Study in Mathematics Tata Institute of Fundamental Research Homi Bhabha Centre for Science Education

Coordinates: 26°55′28″N 75°49′29.5″E / 26.92444°N 75.824861°E / 2

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