Question: is it is the east and juliet is the sun a metaphor?
Answer: It is the East, and Juliet is the sun. That thou, her maid, art far more fair than she. Be not her maid since she is envious. Here, Romeo uses a metaphor to compare Juliet's window to the east, where the sun rises, and he develops this metaphor into another metaphor, by which he compares Juliet to the sun itself.