"I would be very surprised to learn that they have calculated the trajectories of the pieces that break off."
In all honesty, and maybe I'm naive, but i'd be amazed if they didn't try to calculate the effect of their "celestial hammer". Did you mean that such a calculation is beyond mans ability?
Well, it depends upon what you mean by 'calculate'. I'm thinking it may be about like a kid calculating what the effect of the matches he's playing with is.
Cordially,