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Residents of Hyderabad are set to witness a rare astronomical phenomenon known as "Zero Shadow Day" on Saturday, May 9, 2026. The event is expected to occur at approximately 12:12 PM, when the Sun will appear directly overhead, causing vertical objects to cast almost no visible shadow for a brief period.
The phenomenon is considered a unique celestial event that takes place in regions located between the Tropic of Cancer and the Tropic of Capricorn. During this moment, the Sun reaches its highest point in the sky, aligning nearly at a 90-degree angle above the Earth's surface.
What Is Zero Shadow Day?
Zero Shadow Day occurs when the Sun is positioned exactly overhead at local noon. As a result, shadows formed by upright objects such as poles, bottles, trees, and even people temporarily disappear or shrink directly beneath them.
The event generally lasts only for a short duration, often around one to two minutes, before shadows gradually reappear as the Sun continues its movement.
This astronomical occurrence happens twice a year in many Indian cities located within the tropical belt. Hyderabad is among the cities where the event can be observed clearly under sunny weather conditions.
Why the Phenomenon Happens
The Earth's tilt and its revolution around the Sun are responsible for this rare event. During certain times of the year, the Sun's apparent path shifts northward and southward between the tropics. When the Sun aligns directly above a specific latitude, places situated along that latitude experience Zero Shadow Day.
Experts explain that the event offers a practical demonstration of Earth's movement and solar positioning, making it an important educational opportunity for astronomy enthusiasts and students.
Best Places to Observe in Hyderabad
People across Hyderabad will be able to witness the event if skies remain clear around noon. Open spaces with direct sunlight are expected to provide the best viewing experience.
Popular locations where residents may observe the phenomenon include public grounds, parks, school campuses, terraces, and observatory spaces across areas such as Begumpet, Secunderabad, Banjara Hills, Jubilee Hills, Kukatpally, Gachibowli, Uppal, and Himayatnagar.
The Birla Planetarium is also expected to host awareness and observation sessions to help visitors understand the science behind the phenomenon.
Weather Conditions on May 9
Hyderabad is likely to experience intense summer heat on May 9, with daytime temperatures expected to remain high during the afternoon hours. Since the event takes place close to midday, residents planning to step outside are advised to stay hydrated and avoid prolonged exposure to direct sunlight.
Carrying water bottles, wearing light cotton clothing, and using caps or umbrellas may help people stay comfortable while observing the event.
A Rare Celestial Experience
Although the disappearance of shadows lasts only briefly, Zero Shadow Day remains one of the most fascinating astronomical events visible without telescopes or special equipment.
For residents of Hyderabad, the May 9 occurrence offers a rare opportunity to witness how solar alignment affects everyday surroundings while gaining a deeper understanding of Earth's position in space.