some of these asteroids we only have days warning. that's the scary part. To divert an asteroid you need to do it before it comes near so it has a long path to

some of these asteroids we only have days warning. that's the scary part. To divert an asteroid you need to do it before it comes near so it has a long path to begin drifting in a new direction. ie it's only gonna nudge it slightly. Slightly adds up over many millions of miles, not so much when its a week out.