What is the best way to defend Earth from the impact of an asteroid?

When considering the challenge of asteroid impacts, it is important for the first time to maintain probability in the perspective. If people were likely to be erased by the impact of an asteroid, it would probably happen in our history 2 million+ years. Asteroids greater than 25 m (82 ft) on average affect us rarely than once a century, and a significant amount of asteroid will not even reach the surface. The effect of such an asteroid impact is Airblast of a small atomic bomb.

A little more serious than small asteroids that constantly affect Earth are asteroids greater than 250 m (820 ft) on average, which affects Earth about every 50,000 years. Such an asteroid would be released about the gigaton of energy, fifty times smaller than the largest nuclear weapon that has ever been tested but still significant. This would be enough to knock down buildings and ignition everything in the 10-50 miles. The probability of such an asteroid that affects us in the next 50 years is only 1/1000, but the probabilities are sufficiently high that scientists are high enough that scientistsAnd they started to explore ways to redirect unpleasant asteroids if we notice that they are heading for our journey.

One of the earliest ideas to face the impact of an asteroid was simply Nuke Asteroid using a cosmic rocket with a nuclear tip. Part of the problem with this approach is that asteroid fragments would still largely contain their previous kinetic energy and orbit. However, being in smaller pieces would be more likely to burn in the atmosphere.

An even simpler strategy was designed to avert the impact of the asteroid: kinetic collision. If the trajectory of the astronaut is known years in advance, then sending a spacecraft weighing less than a ton that would impact on its side, it would be enough to avert the course of the asteroid in many cases. This was considered as a simpler than an approach of a nuclear weapon.

Another proposed method is the "gravitational trayklant ”-wood of a small spacecraft to chain to the side of the asteroid and use its gravitational or based on turn-based influence to slowly change the asteroid course.

naturally most of these proposed strategies require for many years to implement. In some cases, especially with comets, it can be weeks, days or even hours before impact when we see the coming object. In such a case, we would have to exceed our fingers that it would not hit our city or the country.