Surrounded by huge and towering buildings, this set of architectural structures stand for some long forgotten magical spell as the name suggests!!
Jantar Mantar is the oldest of a set of unique observatories built by Jai Singh II around 1724. There are mantras and yantras that Jai Singh created amidst these structures that give accurate tables for study of time and space to give astronomical insights.
The Misra Yantra is believed to be constructed by Maharaj Madho Singh designed to be accurately measuring the longitude of celestial objects like moon and can measure close to the minute of an arc.
One of the main structures is the Samrat Yantra which is also called as 'King of Instruments' that measures solar time or local time of a place and the sun's declination.
The Jaiprakash Yantra (means Light of Jai) is named after the Maharaja Jai Singh who invented and constructed this hemispherical sundial system used both in day and night observations. The position of the sun was indicated by the shadow of the cross wires inside this hemisphere.
A video on how the sun moves across different time spheres is given at http://www.jantarmantar.org/
For other tourist attractions in Delhi, visit my blogs on Zafar Mahal, Qutub Minar, Humayun's Tomb, Safdarjung's Tomb, Lodhi Gardens, Jama Masjid, Chandni Chowk, Lotus Temple