NASA planning to make nuclear spacecraft to blow up asteroid

Preparing for a potential "doomsday asteroid" impact in 2135, NASA is planning to build a nuclear spacecraft to blow up the 500-metre-wide space rock. Named Hammer (Hypervelocity Asteroid Mitigation Mission for Emergency Response), the eight-tonne spaceship could deflect asteroid Bennu, having 1-in-2700 chance of hitting Earth. NASA is already operating a mission to visit Bennu and obtain samples.