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Some Interesting Facts About Earth

 Planet Earth

  • The Earth was formed approximately 4.54 billion years ago and is the only known planet to support life.
  • The duration for this formation has been estimated to have lasted about 10 to 20 million years.

  • Earth is Mostly Iron, Oxygen and Silicon : 
    If you could separate the Earth out into piles of material, you’d get 32.1 % iron, 30.1% oxygen, 15.1% silicon, and 13.9% magnesium. Of course, most of this iron is actually located at the core of the Earth. If you could actually get down and sample the core, it would be 88% iron. And if you sampled the Earth’s crust, you’d find that 47% of it is oxygen.       



  • Earth is the third planet from the Sun, at a distance of 1 AU or 147 million km / 91 million mi.
  • It is the fifth-largest planet in the Solar System, being the largest of the terrestrial planets (refers to a planet that is made up of silicate rocks or metals).
  • The diameter of Earth is around 12.742 km / 7.917 mi.
  • Earth has a mass of about 5.9722 x  1024 kilograms and a volume of about 260 billion cubic miles or 1 trillion cubic kilometers and total surface area of about 197 million square miles (510 million square km).

  • 70% of the earth's surface is covered in water and remaining 30% is the solid crust that is located above sea level.

  • Earth's atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other gases that make up the remaining 0.1 percent.
  • Earth's atmosphere has 4 layers:
    1.Troposphere
    2.Stratosphere
    3.Mesosphere
    4.Thermosphere

  • Layers explained in details:
    1.Troposhere
    ➡️The troposphere is the lowest layer of our atmosphere. Starting at ground level, it extends upward to about 10 km (6.2 miles or about 33,000 feet) above sea level. We humans live in the troposphere, and nearly all weather occurs in this lowest layer. Most clouds appear here, mainly because 99% of the water vapor in the atmosphere is found in the troposphere. Air pressure drops, and temperatures get colder, as you climb higher in the troposphere.


    2.Stratosphere
    ➡️The stratosphere is the second layer of the atmosphere as you go upward.The stratosphere extends about 50 km (31 miles) above the ground.The infamous ozone layer is found within the stratosphere. Ozone molecules in this layer absorb high-energy ultraviolet (UV) light from the Sun, converting the UV energy into heat.Commercial passenger jets fly in the lower stratosphere.


    3.Mesosphere
    ➡️It extends from about 50 to 85 km (31 to 53 miles) above our planet. Temperature decreases with height throughout the mesosphere.The coldest temperatures in Earth's atmosphere, about -90° C (-130° F), are found near the top of this layer. The air in the mesosphere is far too thin to breathe; air pressure at the bottom of the layer is well below 1% of the pressure at sea level, and continues dropping as you go higher.


    4.Thermosphere
    ➡️Thermosphere is the thinest layer with rare air.Thermosphere can be found anywhere between 500 and 1,000 km (311 to 621 miles) above the ground. Temperatures in the upper thermosphere can range from about 500° C (932° F) to 2,000° C (3,632° F) or higher. The aurora, the Northern Lights and Southern Lights, occur in the thermosphere.High-energy X-rays and UV radiation from the sun are absorbed in the thermosphere.

  • Rotation of Earth:
    ➡️Earth actually completed one orbit in roughly 365.256363 days, it’s this extra .2564 days that creates the need for a Leap Year once ever four years.It rotates on it's axis through 360 degrees in 23 hours 56 minutes and 4 seconds.
 If you are interested to know on any other subject in which you are interested or if you have any doubts then tell us in comment about it.  
             









































































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