Earth's Rotation Day Celebrated on January 8,2024.

Important Days

Earth's Rotation Day is celebrated worldwide on January 8 to emphasize the importance of Earth's rotation. This day marks the anniversary of the scientific demonstration by French physicist LĂ©on Foucault in 1851.


      - January 8, 2025, will mark the 174th anniversary of Foucault's demonstration. The day honors Foucault’s first public display of Earth's rotation in Paris, showcasing its scientific significance.

      - Rotation refers to the Earth spinning around its own axis. The Earth completes one full rotation every 23 hours and 56 minutes (approximately 24 hours).

      - Earth rotates from West to East, causing the day and night cycles, with one complete rotation representing one Earth Day, while the Sun and Moon appear to move from East to West across the sky.

Main Point :-   (i) In 470 BC, ancient Greeks believed Earth rotated on its own axis, and later, in the 16th century, Polish astronomer Nicolaus Copernicus proposed the heliocentric model, suggesting that Earth rotates on its axis and revolves around the Sun.

      (ii) Galileo Galilei confirmed Earth's rotation in 1610 through his observations of Jupiter's moons, while French physicist LĂ©on Foucault provided clear evidence in 1851 using the Foucault Pendulum experiment, demonstrating Earth's rotation for the first time with laboratory equipment.

(iii) Earth rotates on an imaginary axis through the North and South Poles, with a speed of about 1,670 km/h at the equator. The Earth's diameter is 12,714 km from pole to pole and 12,756 km across the equator.

          ____________________________