The crossword solution for the term 'Neighbor of Hercules' is LYRA, a four-letter word. LYRA is a constellation in the northern sky, which is named after the lyre of Orpheus. It is bordered by the constellations Draco, Hercules, Vulpecula, and Cygnus. LYRA is associated with the mythological figure of Orpheus, who was the son of Apollo and the muse Calliope. He was known for his beautiful singing and playing of the lyre, which was given to him by his father. In Greek mythology, Hercules was the son of Zeus and Alcmene, and was known for his strength and courage. He was the greatest of the Greek heroes and performed twelve labors for King Eurystheus. LYRA is located near Hercules in the night sky, making it a fitting neighbor.