Not an expert but I dont think it could be in the window.  The reason is the focus would not work.  either the dirt would be in focus or the the mountains would be in focus.  The mountains are in focus so we pretty much have to assume that whatever that thing is it is out there in the air somewhere.  Now WHAT it is, who knows.  Hard to tell from 7 pixles but why else would the photo be there?  What is the ACTUAL feature in that photo that we are supposed to pay attention to?  Inquiring minds want to know.