Hercules rises on its side. The 4-star "Keystone" contains the famed globular cluster M 13. Kornephoros is the brightest star, Zeta Herculis number two. Rasalgethi, the Alpha star, marks Hercules' head. Hercules' other bright globular cluster M 92 is not visible to the naked eye. More of the classic constellation can be seen in the view shifted to the west. Hercules also has a star with an orbiting planet.