The Constellations are easy to remember arrangements of stars which can and were used for sea and land navigation on Earth. The American Antebellum song "Follow the Drinking Gourd" was the escaped slaves' guide to travel to the North. Take a look "Our Night Sky" by Edward M. Murphy via The Great Courses or possibly at your local library. This course has the stories of the Constellation names and how these asterism were used in ancient times.