NASA will do THIS if an asteroid was about to hit Earth

tech.hindustantimes.com:

Every day we see reports of some massive asteroid or the other approaching Earth and then flying by the planet. These near Earth objects have tremendous powers of destruction if they did hit Earth. But have you ever wondered about what will happen if asteroid hits Earth? US space agency NASA keeps a watchful eye on the happenings in space, especially those that threaten the Earth, like asteroids. NASA reacts to it accordingly if it sees anything dangerous coming towards the planet. The National Aeronautics and Space Administration (NASA) has recently released a video discussing what will really happen if an asteroid hits Earth. The video features NASA Planetary Defense Expert Dr. Kelly Fast and she can be seen saying that it is important to find and locate the asteroids before they become a threat as doing so can prevent the biggest natural disaster of them all.

Currently, an asteroid hitting Earth is the only natural disaster that can actually be prevented, the expert said in the video. NASA's Planetary Defense Coordination Office tracks asteroids and calculates their orbits far into the future. If an asteroid impact threat is discovered years or decades in advance, then a mission to deflect teh asteroid away from hitting Earth may be possible.

However, the problem is that many asteroids escape detection till they are very near Earth and they do not leave much time to take action. These actually fly in towards the Earth from various blind spots especially while coming from the direction of the Sun.

There are a few methods that NASA is studying to deflect an asteroid on a course to impact Earth. One of these techniques is called a gravity tractor. According to NASA, the techniques involves a spacecraft that would rendezvous