The Anna Science Centre-Planetarium in Trichy conducted a special awareness programme on Friday to mark 'Zero Shadow Day' and educate the public about this fascinating astronomical event.
Understanding Zero Shadow Day
Participants were informed 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 even people cast no shadow, as the shadow falls directly beneath the object.
Experts explained that local solar noon in Trichy falls around 12:10 pm, with minor variations each year. Since Trichy is located at approximately 10.79 degrees north latitude, the district experiences two Zero Shadow Days annually, typically around April 18 and August 24.
Interactive Sessions and Demonstrations
The event featured interactive sessions and live demonstrations that helped students and visitors understand the Sun's movement relative to Earth's latitude. The programme aimed to create scientific awareness about solar geometry and its unique effects observable in the region.
Participants showed great enthusiasm as they observed how shadows disappeared completely during the designated time. The centre's staff provided detailed explanations about the science behind the phenomenon, encouraging attendees to explore more about astronomy and Earth's relationship with the Sun.
