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International Asteroid Day

Tags: Important Days

Every year 30th June is observed as International Asteroid day.

In December 2016 the United Nations General Assembly adopted a resolution to observe  30 June as  International Asteroid Day  in order to "observe each year at the international level the anniversary of the Tunguska impact over Siberia, Russian Federation, on 30 June 1908, and to raise public awareness about the asteroid impact hazard." 

he first International Asteroid day was observed in 2017.

 What are Asteroids 

  • Asteroids are heavenly bodies which are smaller in size, made of rocks and mainly found in a belt between Mars and Jupiter.
  • Some asteroids go in front of and behind Jupiter. These are called Trojan asteroids.
  • Asteroids that come close to Earth are called Near Earth Objects (NEO). 
  • Near Earth Objects are potentially very dangerous for Earth.  Many of the Asteroids burn up in the atmosphere but some are large enough to crash on the earth which causes massive damages.

Tunguska Explosion 

  • The largest recorded asteroid impact on Earth in history was over Siberia on 30 June 1908 also known as “Tunguska explosion”.  A large explosion happened over a sparsely populated region in Siberia over Podkamennaya Tunguska River. It released enough energy to kill animal populations in the impact area and flatten an estimated 80 million trees over an area of 2,150 square km.
  • On February 15, 2013, a similar although smaller airburst occurred over the city of Chelyabinsk, Russia. According to NASA, the approximate effective diameter of the asteroid was estimated at 18 meters and it’s mass at 11,000 tons. The approximate total impact energy of the Chelyabinsk Fireball, in kilotons of TNT explosives (the energy parameter usually quoted for a fireball), was 440 kilotons.  
  • Just in comparison the atom bomb dropped over Hiroshima in Japan  was 15 Kilotons and on Nagasaki was 25 Kilotons.  
  • If such crashes in an inhabited city then the level of death and destruction can be unimaginable.

Attempts to deal with future Asteroid impact 

  • Recognising the danger the NEO poses to Earth, the US space agency NASA has launched Mission DART (Double Asteroid Redirection Test). 
  • It will attempt to nudge the course of an asteroid in space so that it can be deflected from its path .
  • If this mission is successful then this model can be used to deal in future on asteroids which are likely to collide with Earth. 

For detail kindly see 16 MAY 2022 POST 


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