Colossally missing the point. The point is that it can apply to plenty of things. Like this.
http://www.popularmilitary.com/media...hter10thmb.jpg
Why are you so totally unable to exercise criticality of your own posts and come up with examples for yourself?
Nowhere does it describe black holes. It says nothing about their size, the fact they're in space, and are collapsed stars with immense gravity. What are you even trying to say? That Medieval Muslims knew about black holes? No they didn't. "Hidden, moving and sweeping" doesn't even remotely tell you what a black hole is for goodness sakes. Your nonsense claim isn't even correct, black holes aren't characterised by movement.