dminches, I got invited a few times to Pixar Studios in Emeryville for private screenings of The Incredibles and Cars before it was released to movie houses. When the theater lights were out and the movies were playing you could see projected on the ceiling, clouds float by and the the night sky full of stars and an occasional shooting star. It was like you were watching the movie outdoors. It wasn't distracting at all.
I think the nighttime constellations projected on your theater ceiling would be great!