Orodruin,
Caught it when it was posted. That effect was to my point. If the expansion velocity is to low any fragments would not reach escape velocity of the target object and fall back to its center of gravity . Same could be said for vaporized mass although it would still generate thrust...
Sooner-or-later, at random, the world will be faced with the threat of a large Comet impact. Our only recourse will be to Nuke it.
In order to know how large the thermonuclear device needs to be to either deflect or destroy it there are two questions:
- What is the expansion velocity of...