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Home Geography

Asteroid Apophis

April 2, 2021
in Geography
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Asteroid Apophis
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In News: Apophis was predicted to come threateningly close to us in the years 2029 and 2036, but NASA later ruled these events out. But still fears about a possible collision in 2068.

About Asteroid Apophis

  • The  NASA space agency has ruled out the possibility of the dreaded asteroid Apophis causing any damage to the Earth for the next 100 years.
  • Named after the ancient Egyptian god of chaos and darkness Apophis.
  • It was discovered in 2004, after which NASA had said that it was one of the asteroids that posed the greatest threat to Earth.
  • Apophis measures 340 metres across– comparable to the size of the huge ship.

What are asteroids?

  • Asteroids are rocky objects that orbit the Sun, much smaller than planets. They are also called minor planets. 
  • According to NASA, 994,383 is the count of known asteroids, the remnants from the formation of the solar system over 4.6 billion years ago.

Asteroids are divided into three classes. 

  • First, those found in the main asteroid belt between Mars and Jupiter, which is estimated to contain somewhere between 1.1-1.9 million asteroids.
  • Second, the group is that of trojans, which are asteroids that share an orbit with a larger planet. NASA reports the presence of Jupiter, Neptune and Mars trojans. In 2011, they reported an Earth trojan as well.
  • Third, classification is Near-Earth Asteroids (NEA), which have orbits that pass close by the Earth. Those that cross the Earth’s orbit are called Earth-crossers. 
  • More than 10,000 such asteroids are known, out of which over 1,400 are classified as potentially hazardous asteroids (PHAs).
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Source: Indian Express
Tags: NewsPrelims

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