The land of the dead. It Iies under the earth and is entered through the western horizon. ENNEAD. . A group of 9 deities that are associated with a major cult center. The best known is the great ennead of Heliopolis, It consists of Atum, Shu, Tefnut, Geb, Nut, Osiris, Isis, Seth and Nephthys.
In Egyptian mythology, Duat (or Tuat) (also called Akert or Amenthes) is the underworld, where the sun traveled from west to east during the night and where dead souls were judged by Anubis, using a feather, representing Ma'at, the goddess of Truth. Souls which were weighted down by sin were eaten by Ammut. It is not known however whether a sinner's heart is heavier or lighter than the feather, only that to be accepted into heaven the heart must weigh the same.