Asteroid Mission A killer asteroid is one icts way to Earth – what can we really do to stop it? Are we Destined to go the way of the dinosaur? Killer asteroids-have long played a role in science fiction. Purpose When a fireball exploded over Chelyabinsk, Russia in 2013, the world Learned que la threat is real. On average, a new NASA finds Potentially hazardous asteroid every day … and there are still Many-have we not found. Many of These space rocks-have the power to destroy cities, and Some are big enough to wipe out human civilization.