"something has hit jupiter"

I was just watching the sky at night with Patrick Moore and aparently something estemated to be the size of Earth has hit jupiter, but.... know one knows what. So how does something that big hit the most watched planets in are system without anyone seeing what it is?
If this has already been posted about then my bad

www.jpl.nasa.gov...

There have already been a few threads about this, it is old news.

One of the threads is here:
www.abovetopsecret.com...

The fact is the black spot has grown too.

But another fact is - we have already been discussing it here for over one week.