jantar-mantarThe Jantar Mantar in Delhi is one of the most important historical places in the city. Visited by many locals and tourists, the place is perfect for understanding the importance of past scientific methods.

Location: Sansad Marg, Connaught Place, New Delhi – 110001
Nearest Metro Station: Patel Chowk on Yellow Line
Nearest Bus Stand: Palika Kendra Bus Stand
Entry Timings: 09:30 am to 04:30 pm, open seven days of the week

Why was Jantar Mantar constructed?

The main purpose of Jantar Mantar was to determine the correct time and the angular distance of the sun and the other astronomical substances north or south of the celestial equator. It is a sundial which works as per the sun’s movements like when the sun crosses the Earth’s celestial equator. It consists of a triangular gnomon(a type of projection piece) with its hypotenuse parallel to the Earth’s axis which displays the time of the day with its shadow. On both the sides of the gnomon is a quadrant of a circle, parallel to the plane of the equator.

How many Jantar Mantar are present all over India?

There were in total five jantar mantar – in Jaipur, Delhi, Ujjain, Mathura and Varanasi. All the Jantar Mantars were built by Maharaja Sawai Jai Singh II, who was an astronomer and a noble in the Mughal emperor Muhammad Shah between 1724 to 1735. He had been asked by the mughal emperor to revise the astronomical calendars and tables. The new tables were then compiled as Zij Muhammad Shahi.jantar-mantar-garden

What are the important instruments in Jantar Mantar?

In total there are 13 architectural astronomy instruments in Jantar Mantar but the most important ones are the Samrat yantra(to find the time of the day), the Jayaprakash yantra(to find the position of various stars) and the Misra yantra(which is made up of five components).

Samrat Yantra

The triangular piece, known as the Samrat Yantra, is the largest instrument present in the Jantar Mantar. Its hypotenuse is parallel to the the Earth’s axis and it is used to calculate the correct time of the day and the declination of the sun with respect to the celestial equator.

Jayaprakash Yantra

The jayaprakash yantra are the hollowed hemispherical instruments present in Jantar Mantar which were used to calculate the position of a star, sun, moon or other objects of the galaxy.

jantar-mantar-sundialMisra yantra

This instrument in Jantar Mantar was not designed by Maharaja Sawai Jai Singh II, but his son Maharaja Madho Singh. This instrument was used to indicate when it was noon in any place of the world and also to find the longest and the shortest days of the year. This is made up of five components namely Samrat,Karka Rasivalaya,Dakshinottara Bhitti, Niyat Chakra and Western Quadrant.

Why should you visit the Jantar Mantar, Delhi?

This structure is one of the best example of technological advancements of the Rajput kings even at that time. If you ever visit Delhi and have even a little interest in technical structures of the past, you must definitely give this structure a visit.



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