Nut is the goddess of the sky and wife of Geb. A sacred symbol of Nut was the ladder, used by Osiris to enter her heavenly skies. This ladder-symbol was called maqet and was placed in tombs to protect the deceased, and to invoke the aid of the deity of the dead. Nut is considered an enigma in the world of mythology because she is direct contrast to most other mythologies, which usually evolve into a sky father associated with an earth mother or Mother Nature.
She appears in the creation myth of Heliopolis which involves several goddesses who play important roles: Tefnut (Tefenet) is a personification of moisture, who mated with Shu (Air) and then gave birth to Sky as the goddess Nut, who mated with her brother Earth, as Geb. From the union of Geb and Nut came, among others, the most popular of Egyptian goddesses, Isis, the mother of Horus, whose story is central to that of her brother-husband, the resurrection god Osiris. Osiris is killed by his brother Set and scattered over the Earth in 14 pieces which Isis gathers up and puts back together. Osiris then climbs a ladder into his mother Nut for safety and eventually becomes king of the dead. A huge cult developed about Osiris that lasted well into Roman times. Isis was her husband's queen in the underworld and the theological basis for the role of the queen on earth. It can be said that she was a version of the great goddess Hathor. Like Hathor she not only had death and rebirth associations, but was the protector of children and the goddess of childbirth. Myth of Nut and Ra
Ra, the sun god, was the second to rule the world, according to the reign of the gods. Ra was a strong ruler but he feared anyone taking his throne. When he discovered that Nut was to have children he was furious. He decreed, "Nut shall not give birth any day of the year." At that time, the year was only 360 days. Nut spoke to Thoth, god of wisdom, and he had a plan. Thoth gambled with Khonshu, god of the moon, whose light rivaled that of Ra's. Every time Khonshu lost, he had to give Thoth some of his moonlight. Khonshu lost so many times that Thoth had enough moonlight to make 5 extra days. Since these days were not part of the year, Nut could have her children. She had 5: Osiris, Horus the Elder, Set, Isis, and Nepthys. When Ra found out, he was furious. He separated Nut from her husband Geb for all eternity. Her father, Shu, was to keep them apart. Still, Nut did not regret her decision.