Jantar Mantar
Jantar Mantar in Jaipur is the largest stone astronomical observatory in the World. It is located just next to the city palace of Jaipur in Rajasthan. Built during the period between 1727 and 1733, the Jantar Mantar is still in a running condition and it stands as a witness regarding the wisdom of former age.
The Jantar Mantar is an equinoctial sundial, consisting of 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 and the other heavenly bodies.
There are five Jantar Mantars in India, of which the largest is in 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.
The main objective of building this vast observatory was to study and gather information about space and time. The instruments here pertain to Egyptian study of Ptolemaic astronomy and follows three classical celestial coordinates to track the positions of heavenly bodies- namely horizon-zenith local system, the equatorial system and the ecliptic system. Another fact that makes this destination unique is that the world's largest sundial is situated here. The observatory in Jaipur is a part of a collection of five other such observatories built by Raja Jai Singh, which are located in New Delhi, Ujjain, Varanasi and Mathura. The best experience here is undoubtedly the light and sound show that takes place every evening and Jantar Mantar lights up like a firefly!
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