Well with all moving objects calculations must be made.
We are moving, it is moving.
We need to know its path and our path.
Catching a baseball is a lot easier LoL
yep. Constructing the path to be taken, by a comet, is nearly a shot in the dark. Comets appear from nowhere, and the calculations are normally thirty percent to forty percent correct on the path. Whoever said our planet (Earth) sits in the middle of a shooting gallery knew exactly what was true.