What is the theme in The Constellation Orion by Ted Kooser?

Language and its meaning is a central theme in the poem. The effect of Kooser's poem "The Constellation Orion" rests on two puns. The first one is intentional, the second one accidental. These puns focus our attention on the practice of naming, something that human beings do to make sense of their world, but also something that poets especially have been noted for doing. Foreshadowing his son's mistake, the father says that the boy's head is "like a sun." Such punning underscores the slippery nature of language itself,