Most love poems promise the moon. The speaker of "Jupiter" promises something humbler and stranger: to be one of Jupiter's moons, and to be happy with that. Everything in the poem leads toward this small wish, through a bit of bait, some gentle encouragement and a quiet ranking of hopes.
The bait comes first. "i want to tell you there's a tenth planet, / and i know that catches your attention." The speaker knows the listener well enough to know what will make him look up. The tenth planet is never explained, so it works less as astronomy than as a way of getting a nervous person to lean in. Judging by the rest of the poem, the new world on offer may be the closeness between the two of them, though the text doesn't say so.
What follows is a portrait of fear. The listener is "a space explorer who's scared of the stars," a lovely contradiction: someone drawn to the sky who "doesn't care for all of the unknown." The speaker doesn't tease him for it. Instead the stars are re-tasted: "the sweet honey, strawberry, and cinnamon." Swapping sight for taste, and the cosmos for the kitchen, makes space edible and safe. Still, the poem concedes that the fear has a cause: "the sky is bright and a little bit blinding." The "little bit" is typical of the whole voice, which understates everything. Then comes the line that gives the poem its title: "but you have Jupiter stuck in your eyes." It could describe the colour of his eyes, or what he cannot stop looking at, and probably both. "Stuck" makes the image slightly comic, like a speck that won't blink away, and it also suggests how big the thing is, since Jupiter is the largest planet in the solar system.
In the second stanza the grammar shifts. "that space explorer's braver than he thinks" speaks about him in the third person, like someone passing on a truth he can't see in himself. Then the speaker turns back to "you" with promises that are practical and modest: "i've seen a few planets, i'll hold your hand." The comma joins two thoughts the way people do in speech, and "a few" is an honest amount. This guide is only a slightly more experienced traveller. The advice that follows, "never lost if you keep sight of what you want," treats desire as a compass. That makes the next line quietly daring, because what the explorer wants might be something the speaker cannot offer.
So the speaker asks for a place in Jupiter's orbit: "i hope you find callisto somewhere in me / i'd be happy just to be europa or ganymede." A moon is the thing that stays close because of gravity. There is also a layer of myth here, whether or not the poet meant it. In Greek stories Callisto, Europa and Ganymede were all loved by Zeus, whom the Romans called Jupiter. Asking to be one of these moons is a way of asking to be loved by the person with Jupiter in his eyes. The wording is careful, too. The speaker "hopes" for Callisto, then retreats to being "happy just to be" one of the others. That "just" lowers the ambition and shows a person making themselves small so as not to ask too much.
The construction is simple but deliberate. A two-line opening is followed by two six-line stanzas, with no end rhyme and no strict metre. The lines run to roughly ten syllables and sound like speech. The poem ties itself together through repetition instead. Both stanzas end on "eyes," and the word "sweet" travels through the poem: the stars are "how sweet," the honey is "sweet," and in the last line the explorer himself has "sweet jupiter eyes." The sweetness the speaker promised the stars has moved into the person who feared them. Capitalisation matters too. Everything is lowercase, even "i" and the moons, except "Jupiter" in line six. The planet is large and the speaker small, until the final line, where "jupiter" shrinks to lowercase as if it has become an everyday word for the beloved. Finally, the poem ends without a full stop, leaving the speaker still circling.
The poem is worth reading because it takes cold scientific vocabulary and makes it tender, and because its speaker never demands anything. Love here is company on a frightening journey, offered by someone who would rather orbit than conquer.