These three sets of stars apparently had special significance for the Nabta Playans. Sirius is the brightest star in the night sky, and the striking belt of Orion has caught the attention of many cultures around the world. By the third millennium B.C., the Egyptians associated Sirius and Orion with Isis and Osiris respectively. Dubhe, a fairly bright star close to the north pole, became associated with funeral rituals in dynastic Egypt.