Written in just three short lines plus a one-word tag, the poem turns the sky into a love triangle. The moon, which really does pull the tides, is pictured as a suitor "courting" the sea. Then the sun shows up, and the speaker announces it with a playful, slightly teasing "but hear comes the sun." The word "hear" instead of "here" may be a typo, or it may be a small pun on listening, but either way it doesn't change the sense.
The last word, "jealousy," sits off to the right like a quiet signature or afterthought. It tells us how to read the scene: the sun isn't just arriving, it's resentful of the attention the moon is getting. The speaker seems amused rather than angry, watching nature act out a very human feeling. The mood is light, wry, and a little romantic, like a tiny fable about how love and rivalry often arrive together.