UPDATED again, below.
Well, my endless search for cover-art for Princesses In SPACE!!! (not the actual title) has come to an end. This has to be the cover.
Obviously it won't be, but...this is SO evocative of what I hope is the book's "feel". I really want the eventual cover art to be something like this!
UPDATE: I pasted the picture on a starry background (which I stole from the Astonomy Picture of the Day, because that's what I do!):
UPDATE II: The artist who created the image above somehow found it here, and left a gracious comment. Her name is Liza van Rees, and more of her work is available here.