Could We Really Stop A Big Asteroid Hitting The Earth?

If one day we found that a large asteroid was heading directly for earth, what is the largest size we could stop. We have already proven that by crashing a spacecraft into an asteroid that we can knock it off course, that was the NASA DART mission. But what if it were rather bigger than the 20m Chelyabinsk one. What if it were 100m, 1km, or 5km, would we have any chance of deflecting it away and stopping it from hitting the earth today or in years to come. Written, researched and presented by Paul Shillito. To give one-off tips and donations please use the following : or paypal.me/curiousdroid Eριχθόνιος JL Steve J - LakeCountySpacePort Source: