Because that's the next Doctor Who episode (If you've seen the 2014 Christmas special, it says at the end: The Doctor and Clara will return in The Magician's Apprentice) If you watch The Sorcerer's Apprentice, there's a scene with flying stars like the ones in your picture
This is incredible! There's something childlike and dreamlike about it, whimsical even. I like it! I like that you captured that wonderment part of the show in it. Also, I like Clara's expression especially. Great job
Yeah, I wanted to draw something purely sci-fi in that retro sci-fi way - a random encounter in space, something exciting and not threatening or meaningful You've put into words better than I could, anyway!