The poetic device used in the line: "And often is his gold complexion dimm'd;"?

personification

Explanation:

giving summer person-like qualities

the sun warms our planet, and with the moon, creates the tides. the moon orbits the earth and in turn, the earth orbits the sun. because they appear to be the same size in the sky, the sun, earth and moon work together to create eclipses. when the moon is directly in between the earth and sun