The term POETIC SPHERES is composed of two words: 'POETIC' and 'SPHERES'. The first word, 'POETIC', refers to the art of writing poetry. The second word, 'SPHERES', is a reference to the round shape of the Earth and other celestial bodies. Together, the two words form a phrase that suggests the idea of POETIC beauty found in the natural world. ORBS, the four-letter solution to the crossword, is another word for SPHERES, referring to the round shape of the Earth and other celestial bodies.