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21 Jan, 18
21 Jan, 18

Are we safe from the gigantic asteroid heading towards Earth?

As Apophis asteroid approaches closer to the planet, NASA scientists and researchers are prepared to protect Earth from any possible impact it may have.

By Qrius

By Devanshi Saxena

A gigantic asteroid is heading towards Earth and will pass by in particular proximity to the surface. In such a scenario, is it really safe out there?

There has been some news regarding a massive, “potentially hazardous” asteroid spanning more than the length of the world’s tallest building—Burj Khalifa. The roughly 0.7-mile long asteroid with a speed of 67,000 miles per hour is supposed to fly by our planet on February 4.

What does NASA’s Spaceguard say?

According to the National Aeronautics and Space Administration’s (NASA) Near-Earth Object Observations Program, “There have been no asteroids or comets observed that would impact Earth anytime in the foreseeable future. All known Potentially Hazardous Asteroids have less than a 0.01% chance of impacting Earth in the next 100 years”. Both ground and space-based telescopes are used by NASA to detect, track and characterise asteroids and comets passing at a distance of about 30 million miles of Earth. The Near-Earth Object Observations Program, commonly called ‘Spaceguard’, discovers these objects and then analyses their trajectory to characterise the physical nature of these Near Earth Objects. Whether or not this object is hazardous to the Earth is then determined through the data collected by the Spaceguard.

The possible effects of Near Earth Objects

No threats have been detected by Spaceguard to date. Only meteoroids, which are tiny asteroids that burn up in the atmosphere, have been continuously falling. However, in certain cases with Near Earth Objects (NEOs) larger than 140 metres, the probability of palpable danger increases. Crashing on the land, they may form large craters and generate a tsunami wave if they hit the ocean. Comparatively smaller NEOs are not hazardous if they hit the ocean. However, if they hit the land, the risks associated with it can be critical. Most likely, these objects will burn up on entering the Earth’s atmosphere due to friction, but the shockwaves generated by this explosion can be dangerous.

The Chelyabinsk meteor that fell in Russia in 2013 was only 20 meters in diameter and caused damage to over 7,200 buildings and injured 1,491 people. International Asteroid Day is observed every year on 30 June to raise awareness about asteroids and what can be done to protect the Earth, its families, communities, and future generations from such a catastrophic event. Asteroid Day is held to commemorate the anniversary of the Siberian Tunguska event that took place on 30th June 1908, the most harmful known asteroid-related event on Earth in the recent history.

The preparation to encounter Apophis

In spite of the looming danger, the odds appear to be in our favour. The next encounter with a large NEO, Apophis, is expected to be in 2029 and then again in 2036. NASA and the Federal Emergency Management Agency (FEMA) have run three simulated scenarios to assess the prevention methods in case of an asteroid intervention. Scientists have been developing technology that would allow them to deflect asteroids from a distance. They have been working on the Double Asteroid Reflection Test (DART) to develop a technique known as the kinetic impactor. This would allow them to strike an asteroid approaching Earth by shifting its orbit. The first test with DART is planned for October of 2022 and then again in 2024.

Overall, asteroid interventions have not appeared to be a very troublesome issue in recent history. But, considering the potency and the possible risks associated with an asteroid intervention, scientists from all over the world are researching upon developing the possible methods and techniques to deflect any harm to our planet that may be caused by any astronomical entity.


Featured Image Source: Pixabay


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