One thing that he compares her to is the sun. He says "Arise fair sun and kill the envious moon." He then goes on to say that she is way prettier than the silly moon.
"Hark, what light by yonder window breaks? / It is the East, and Juliet is the Sun."
The sun
 
Scene 2 in Capulet's orchard:
JULIET appears above at a window
But, soft! what light through yonder window breaks?
It is the east, and Juliet is the sun.
"It is the east and Juliet is the sun."
He compares her eyes to stars.
More famously, he says, "What light from Yonder window breaks? It is the east, and Juliet is the sun."
The sun. "It is the east and Juliet is the sun."
the morning sun
Romeo compares Juliet to the sun.
she is as bright as the sun
light
Balcony scene
In Shakespeare's play 'Romeo and Juliet', Romeo makes various comparisons in the balcony scene when he is talking to Juliet. In this scene in the play, Romeo refers to her variously as * the Sun * an angel * a fair saint Shakespeare also wrote many sonnets. His Sonnet number 18, which conceivably could have been spoken by Romeo to Juliet in the balcony scene, begins "Shall I compare thee to a summer's day?"
no
juliet
the best scenes are the balcony scene and the last scene (when Romeo and Juliet die)
The sun
Romeo compares Juliet to an angel who stands over the clouds.
Balcony scene
The sun!
the sun
In Shakespeare's play 'Romeo and Juliet', Romeo makes various comparisons in the balcony scene when he is talking to Juliet. In this scene in the play, Romeo refers to her variously as * the Sun * an angel * a fair saint Shakespeare also wrote many sonnets. His Sonnet number 18, which conceivably could have been spoken by Romeo to Juliet in the balcony scene, begins "Shall I compare thee to a summer's day?"
Act II
In Shakespeare's play "Romeo and Juliet," Juliet's nurse interrupts Romeo while he is speaking to Juliet on the balcony. The nurse plays a key role in the relationship between Romeo and Juliet, often acting as a messenger between the two lovers.
Juliet sends her Nurse to find out if she is to be married to Romeo.
Juliet does not wait for Romeo on her balcony. Romeo is a kind of "peeping Tom" and overhears her talking to herself. She gets quite upset when she finds out that he's there.
Before the Balcony scene, Romeo compares Juliet to Rosaline by stating that Juliet's beauty outshines that of Rosaline and makes him forget all about his previous love for Rosaline. He expresses how Juliet's beauty has captured his heart completely, in contrast to Rosaline who rejected his love.
Juliet in the balcony scene