Zero Shadow Day observed in Trichy

Trichy: Anna Science Centre-Planetarium in Trichy organised a special awareness programme on Friday to mark ‘Zero Shadow Day' and educate the public about the astronomical phenomenon.Participants were briefed that Zero Shadow Day occurs when the Sun is positioned exactly overhead at solar noon, reaching its zenith at a 90-degree angle. At that precise moment, vertical objects such as poles, sticks, or people cast no shadow, with the shadow falling directly beneath the object.Experts explained that local solar noon in Trichy falls around 12.10pm, with minor variations each year. Located at approximately 10.79°N latitude, the district experiences two Zero Shadow Days annually, usually around April 18 and Aug 24, they said.The event featured interactive sessions and live demonstrations to help students and visitors understand the Sun's movement relative to Earth's latitude. The event aimed to create scientific awareness about solar geometry and its unique effects observable in the region.