Sawai Jai Singh built Jantar Mantar (astronomical stone observatory )in five places and the one at Jaipur is the largest one | Road map of Jantar Mantar, Jaipur

Sawai Jai Singh built Jantar Mantar (astronomical stone observatory )in five places and the one at Jaipur is the largest one | Road map of Jantar Mantar, Jaipur

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Big telescopes are available nowadays to observe starts, planets and their movements.  But at a time where there is not technical knowledge available, nearly 300 years back, a king has constructed a wonderful observatory. This is in Jaipur, Rajasthan.  UNESCO has recognized it a World Heritage site.  Name of the observatory is ‘Jantar Mantar’.

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‘Jantar Mantar’ means a device which calculates.  Jantar Mantar originated from the Sanskrit word ‘Yantra Mantra’.  Various shapes of stone constructions can be seen here.  Constructions in Geometric shapes like Arches, triangles, circles and steps to climb up to them are all useful to observe the space.  If each construction can be considered a machine one can see 17 machines here.  The working of each machine is different.  It is a wonder to know what types of calculations were with the help of these machines.  Date, time, eclipses, orbits of planets, movement of stars, positions of stars, seasons, weather etc were calculated with the help of these constructions.  The information these machines provide are very accurate.  One of the important machines is the biggest Sun Dial.  The height of this sun dial is 90 feet and it shows the time with a difference of just 2 seconds basing on the shadow formed by the sun rays.  The shadow of this sun dial moves 1 milli meter per 1 second.

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‘Unnatamsa Yantra’ calculates the positions of planets.  ‘Raj yantra’ helps to know the dates and festivals.  ‘Kranti yantra’ helps to find out the latitudes and longitudes of space objects.  ‘Chakra Yantra’ explains the angles of planets and starts from the equator.  There are many other machines like Ram yantra, Diganta yantra, Jaiprakash yantra, Rasivalaya yantra and Dhruva yantra.

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Sawai Jai Singh – 2, king of Jaipur began this contruction in 1728 and it was completed in 7 years.  Sawai Jai Singh built such observatories at five places and the one at Jaipur is the largest one.

Road map of Jantar Mantar, Jaipur

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