STS60, thanks a lot for your replies. Besides Nicolas in the first page, (BertL and JayUtah to some extent also), you were the only poster to really REPLY to my article.

Now first of all: don't mix Comet Shoemaker-Levy 9 with the rest of the links you provided.

All your links belong in one of two categories:
- observable from Earth;
- NOT observable from Earth.

Comet Shoemaker-Levy impact on Jupiter is the only thing that belongs in the first category. BTW, It also belongs, from another perspective (End Times or not) in the End Times category, but that's another story.
More later.