What does Juliet mean when she says gallop apace you fiery-footed steeds Toward phoebus' lodging?

Juliet is alluding to the classical image of the sun as a chariot, driven by Phoebus, and pulled by horses with feet of fire. She wants the chariot (the sun) to go faster towards Phoebus' lodging (the west, where the sun sets), or in other Words, she wants the day to be over. And why? So she can spend the night with Romeo.