NASA warns of 5 potentially Hazardous heading towards Earth #breakingnews

On the 15th September 2022,an Asteroid the size of an Aeroplane, passed very close to Earth NASA has classified this Asteroid as Potentially Hazardous and closely monitoring it. The Asteroid passed as close as 4.47 million Kms to Earth, which is approximately 12 times the distance from Earth to our moon. This distance seems to be too far from Earth, and it is unimaginable that this Asteroid could be a threat to our Planet. Then, why are these Asteroid’s classified as potentially hazardous to our Planet? Is there a possibility that such asteroids might smash into Earth in future ? Let's find out. Any object, larger than about 150 meters, and hovering within 7.5 million kilometres near to Earth, are termed to be Potentially Hazardous. The International Astronomical union had identified around 1500 such objects which fits into the category of Potentially Hazardous asteroids. The asteroids range in the size as small as leaning tower of Pisa and the as big as the of City of Manila in Philippines. These objects are so dangerous that if they were to impact Earth, it could result in devastating consequences on our planet. The consequences will be similar to the Cretaceous-tertiary Extinction, which occurred 65 million years ago, which was the reason behind the extinction of Dinosaurs from our planet. Astronomers estimated that the size of that Asteroid might have been 10 Kilometers or even bigger. Luckily, such large collisions happen roughly once in 18 to 20 million years. It doesn’t mean that our planet is safe from such large collisions in near future. On 15th February 2013, a near earth asteroid approximately 20 meters in diameter, entered our atmosphere at a speed of 69,000 kilometers per hour above Chelyabinsk Oblast in Russia. This object was undetectable until its atmospheric entry, and exploded creating huge shock waves in that region. The energy released by the explosion was equal to 500 kilotons of TNT, which is 33 times more than that of atom bomb dropped in Hiroshima. Even though no deaths were reported, the impact left thousands injured and damaged several properties. This incident had raised the eyebrows within the Astronomers community, and they acknowledged that such undetectable asteroids, are real threats to our planet. Discovering asteroids orbit in the faint sky and in the background of numerous stars is really a tough task. A highly automated impact prediction system called Sentry is operated by JPL centre for NEO studies specially to track Near Earth objects. This system continuously monitors large asteroids which can impact Earth in the next 100 years and catalogues them. As of June 2022, around 2270 Potentially Hazardous Asteroids have been discovered, out of which 19 objects might smash into Earth within the next decade. NASA’s DART mission is on its way to deliberately crash into an asteroids moon Dimorphous on 26th September 2022. The aim of the mission is to find out, if the crash could change the asteroid's orbit, and if the mission is successful, it could provide a long term solution to protect our planet from large asteroid impacts.

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