Hello, This is the thread I originally wanted to respond to, but it's closed: https://www.physicsforums.com/showthread.php?t=650126 I also found this on Wiki-talk page, which seems to be the same argument: http://en.wikipedia.org/wiki/Talk:O...uare_law_actually_does_explain_dark_night_sky a.) left image representing first shell contains 10 bright stars b.) right image representing second shell has 40 stars each 4x less bright c.) total light received is the same, but does that make them equally bright? Now, my question is, are those two images indeed correct representation of the paradox? And if so, are those two images really supposed to be equally bright? I mean, are they? They certainly don't look equally bright. So what's the trick, is this some kind of optical illusion, or something?