A speaker stares at a dark blue sky full of bright stars and tries to reach them, but can't even come close. The repetition of "sky," "stars," and "reach" in the opening lines mirrors that effort: the speaker keeps circling the same wish without getting any nearer.
Then the mood shifts. Seen from far away, the stars seem free, and that freedom spills over to the speaker, who imagines dancing as if nobody's watching and singing "like an idiot." These lines feel light and playful, a small release from self-consciousness. But the wish to "be a part of them" brings the sadness back. The speaker feels as if they belong, yet also longs for a home that was never theirs.
The final word, "Hiraeth," a Welsh term for a deep homesickness for a place that may never have existed, sums it up. The poem leaves a mood of wonder mixed with quiet loneliness: the stars are beautiful, but they stay out of reach.