Honestly, the only critique I really have is of the title because I think it slightly holds the work back as a whole. If it were me, I would simply change it to something like "The Girl Who Spoke The Universe" or something along those lines. The beauty of your image (aside from basic composition and masterful color correction) lies in that Milky Way up there, which in my opinion seems to be coming from her mouth as opposed to her chatting with it, which is what your title suggests to me. I wouldn't have even bothered to say anything about this except that this is a piece I very much wish I had created myself and, therefore, I really want it to be all it can be. Congrats!