I realize someone already answered you, but just to further clarify: astrology was a common literary theme during the English Renaissance. Probably the most famous example modern audiences would be familiar with would be Romeo and Juliet, the "star-crossed lovers."

Stars signify destiny and birthright, so if the young lovers' stars are crossed, they're not in alignment and their union is doomed to a tragic ending. If one of them could've "changed their stars," Romeo and Juliet might've had a happy ending.