Bengaluru residents observed a rare celestial treat on Wednesday as their shadows vanished for a brief moment during a phenomenon known as ‘Zero Shadow Day’, between 12:17 pm and 12:23 pm.
Bengaluru, positioned at a latitude of 13.0 degrees north, experiences this phenomenon twice a year, typically around April 24/25 and August 18. It’s usually observed around the equinoxes in March and September each year.
Join us on 24 April to celebrate #ZeroShadowDay #ZSD for locations at #Bengaluru latitude Measure shadow lengths & check out our cool demos! We will work with Bhopal & Chennai to calculate Earth's diameter and rotation speed!@asipoec @CosmosMysuru @doot_iia @IndiaDST pic.twitter.com/99u9oD3Hy0
— IIAstrophysics (@IIABengaluru) April 22, 2024
In addition to Bengaluru, people in places such as Kanyakumari, Bhopal, Hyderabad and Mumbai are also likely to witness the phenomenon.
Zero Shadow Day in Other Cities of India
Kanyakumari: 10 April and 01 September (Local Noon: 12:21, 12:22)
Bengaluru: 24 April and 18 August (Local Noon: 12:17, 12:25)
Hyderabad: 09 May and 05 August (Local Noon: 12:12, 12:19)
Mumbai: 15 May and 27 June (Local Noon: 12:34, 12:45)
Bhopal: 13 June and 28 June (Local Noon: 12:20, 12:23)
What is Zero Shadow Day?
Zero Shadow Day is an astronomical event where the Sun is directly overhead at solar noon, resulting from Earth’s axial tilt of about 23.5 degrees and its orbit around the Sun.
This phenomenon is most pronounced in locations near the equator, where the Sun passes directly overhead during the equinoxes. It occurs twice a year in areas situated between the Tropic of Cancer and the Tropic of Capricorn.
When does it typically occur?
Zero Shadow Day occurs biannually in regions between the Tropic of Cancer and the Tropic of Capricorn. According to the Astronomical Society of India (ASI), it usually happens when the Sun reaches its zenith point, with dates varying based on specific locations and latitudes.
This event holds cultural and educational significance, often celebrated as a unique astronomical occurrence. It serves as an opportunity to educate people about Earth’s axial tilt, its orbit around the Sun, and the changing angles of sunlight throughout the year.
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