The term POET'S SPHERE is composed of two crossword solutions: ORB and 3 letters. The word ORB is defined as a round or spherical object, and is often used to refer to the celestial sphere, which is the imaginary sphere that surrounds the Earth and contains the stars, planets, and other celestial bodies. This term is often used in literature and poetry to refer to the universe, and thus POET'S SPHERE can be interpreted as the universe as seen through the eyes of a poet.