Today no one needs a sundial to tell time, yet sundials provide a unique way of teaching children the concepts of time and its measurement, says the Nehru Planetarium Director Piyush Pandey.

The recently installed Sundial (also called shadow dial) at the Nehru Planetarium at Worli in central Mumbai tell time by interpreting the angle at which the shadow of its shadow casting element (gnomon) moves under the Sun.