Earth Rotation Day 2023: Every year, January 8 is recognized as Earth Rotation Day. Today marks the anniversary of French physicist Leon Foucault’s 1851 demonstration that the Earth rotates on its axis.
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January 8, 2023
We are all familiar with the phenomenon of the earth rotating. It occurs when our planet orbits the sun on a vertical axis. This happens once per day.
Earth Rotation Day 2023: History
It took philosophers and scientists many years to figure out how the earth orbits the sun. The Greeks made the claim that the earth rotated in 470 BC. Some experiments have also been conducted to support this claim.
The most notable was done in 1851 by a French physicist named Leon Foucault. He invented a pendulum to demonstrate the rotation of the earth around a fixed axis. Because of its popularity, this experiment has been used to demonstrate this phenomenon. It was later displayed at the Pantheon in Greece and the Paris Observatory. Even today, this particular experiment takes precedence over others in several international museums.
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What is the Earth’s rotation and its importance?
A hypothetical line passing straight through the earth represents the axis around which the Earth rotates. The axis connects the North and South poles. Every 24 hours, the Earth rotates on this nearly vertical axis. However, it does more than simply determine the length of our days or years. The seasons are also affected by the earth’s rotation.
Even the Coriolis Effect, the deflection of air currents, is caused by the earth’s rotation. In the Northern Hemisphere, the air is deflected to the right (clockwise), while in the Southern Hemisphere it is deflected to the left (counterclockwise). When high pressure winds blow westward from 30 degrees north, they will create trade winds. When air currents move eastward, westerly winds are created.
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Earth Rotation Day 2023: Meaning
The concept and meaning of the day is very simple. In addition to learning more about Foucault’s famous experiment, the aim is also to celebrate this phenomenon. Children all over the world learn about this phenomenon with great enthusiasm and curiosity to learn more.
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Earth Rotation Day 2023: Important Facts
- The diameter of the Earth is 12,714 km (7,900 miles) from North to South Pole and 12,756 km (12,756 miles) across the equator (7,926 miles).
- Days on Earth are getting longer and longer.
- For millions of years, there has been a cyclical relationship between Earth’s continents.
- To protect us from the harmful effects of solar radiation, Earth’s molten iron core creates a powerful magnetic field that directs the solar wind across the planet.
- 70% of the Earth’s surface is covered by water. Only 3% of it is fresh water and 97% is salt water!
- Scientists have determined the planet’s age to be just under 4.5 billion years by examining rocks from many places around the world.
- The most recent glaciation on Earth began about 70,000 years ago and ended 11,500 years ago. Its greatest extent was reached 18,000 years ago.
Categories: Optical Illusion
Source: pagasa.edu.vn