5. Leo: The Lion
Leo is one of the most recognizable constellations, its sickle-shaped star pattern instantly familiar. Known to Mesopotamians and Greeks, Leo is synonymous with the Nemean Lion slain by Hercules. Ptolemy, along with Persian astronomers, documented the constellation, noting the brilliance of its star Regulus. Leo remains a prominent fixture in cultural and scientific star maps. Full details at Space.com: www.space.com/17081-leo-constellation.html