Perfect circle, Haiku

          Perfect circle round
               the moon
          In the center of the sky

by Jack Kerouac (1922-1969), from Book of Haikus  (Penguin, 2003).  Thanks, Francisco.

PS.  If Kerouac were a mathematician he'd have noticed that "perfect" is implied by the definition of "circle" and is unnecessary.  But Kerouac was a poet and he saw a different necessity.