If plans are successful, we might see the world’s first Space Defence Force. This system will be used to prevent massive asteroids from striking our planet.
DART or Double Asteroid Redirection Test is NASA's first mission planetary defense system. It will hit the binary asteroid Didymos B, a small moon asteroid orbiting a larger asteroid called Didymos A. Scientists will get only one chance to strike the target successfully, and will launch the spacecraft in the summer of 2021. Just in case you’re wondering, know that this asteroid won’t even come close to hitting the Earth. The spacecraft is expected to strike its target in September 2022.