They Could Push the Asteroid With Spacecrafts
Johnson theorized that unmanned spacecrafts could be sent into space to alter the course of the asteroid. These ships would strike at the asteroid at high speed. In theory, the kinetic impact would change the space rock’s trajectory away from the planet. This is by far the one scenario that has the highest chance of working. Of course, they could go with Hollywood’s idea, but Johnson isn’t very optimistic.