A better question might be, how doesn't Romeo describe Juliet in this scene! This is the famous balcony scene, when Romeo stands below her window in the night, staring up at her room, and then her, with longing.
He speaks of her as a heavenly body (the sun specifically):
"But soft! What light through yonder window breaks?
It is the East, and Juliet is the sun!"
He calls her an angel ("bright angel," actually, accenting her luminous qualities). He says she is like the stars, in their wonder and sparkling.