Well, I went back up there and found nothing new. I looked at every piece (I think) including each star.
Dont' forget you can zoom in ;-)
Well, when I say I looked at each star, I mean by that I zoomed at each. Actually I scanned the whole scene and each time there was a detail, I zoomed on it. Of course I may have missed something, but it's quite hard if I don't know what I'm searching. Not sure I will go back. That's not really a fun part of the game.