Though asteroids (space rocks) are small, rocky objects that orbit the Sun, they can bring tsunamis, shock waves and flattening winds that could be catastrophic and we are well aware of that. Of 7 lakh asteroids, four asteroids that could strike the Earth are identified as Asteroid 101955 Bennu, Asteroid 2014 JO25, Asteroid 2014 AG5 and Asteroid Apophis.