If you are familiar with your astronomy you can usually find an sensible explanation for most of these phenomena. It is the small percentage where there is no simple explanation that are the interesting ones. Something outside our normal paradigms? An illusion? I don't know about you, but when I see something I can't explain, it makes me very motivated to find an explanation.

And no, it doesn't have to be ****woooo****, but who is to say that some of the unexplained things aren't beyond our current understanding? I'm quite sure we haven't yet got a complete understanding of everything in the physical world yet!