Question

what is jantar mantar ​

Answer 1

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.

Answer 2

jantar mantar is located in the modern city of New Delhi. it consists of 13 architectural astronomy instruments. the site is one of five built by Maharaja Jai Singh ll of Jaipur , from 1723 onwards, revising the calendar and astronomical tables.