What is the black shape in this picture?

so they have got images of a planet, and I think its has some wierd black shape in it, here is the picture a href="http://uk.news.yahoo.com/photos/slideshow/space-photos.html?imageUrl=/afp/20081113/r_p_afp_sc_usa/psc-photo-1-from-afar-the-f-865bfc647ec9"http://uk.news.yahoo.com/photos/slidesho…/a I think it looks like that wierd animated rabbit thing on you tube. so does anyone know why there is a black shape there?