Nut (goddess) in the context of "Earth Mother"

Egyptian astronomy started in prehistoric times, in the Predynastic Period. In the 5th millennium BCE, the stone circles at Nabta Playa may have made use of astronomical alignments. By the time the historical Dynastic Period began in the 3rd millennium BCE, the 365 day period of the Egyptian calendar was already in use, and the observation of stars was important in determining the annual flooding of the Nile.

The Egyptian pyramids were carefully aligned towards the pole star, and the temple of Amun-Re at Karnak was aligned on the rising of the midwinter Sun. Astronomy played a considerable part in fixing the dates of religious festivals and determining the hours of night, and temple astrologers were especially adept at watching the stars and observing the conjunctions and risings of the Sun, Moon, and planets, as well as the lunar phases.

Osiris (/oʊˈsaɪrɪs/, from Egyptian wsjr) was the god of fertility, agriculture, the afterlife, the dead, resurrection, life, and vegetation in ancient Egyptian religion. He was classically depicted as a green-skinned deity with a pharaoh's beard, partially mummy-wrapped at the legs, wearing a distinctive atef crown and holding a symbolic crook and flail. He was one of the first to be associated with the mummy wrap. When his brother Seth cut him to pieces after killing him, with her sister Nephthys, Osiris's sister-wife, Isis, searched Egypt to find each part of Osiris. She collected all but one – Osiris's genitalia. She then wrapped his body up, enabling him to return to life. Osiris was widely worshipped until the decline of ancient Egyptian religion during the rise of Christianity in the Roman Empire.

Osiris was at times considered the eldest son of the earth god Geb and the sky goddess Nut, as well as brother and husband of Isis, and brother of Set, Nephthys, and Horus the Elder, with Horus the Younger being considered his posthumously begotten son. Through syncretism with Iah, he was also a god of the Moon.

A mother goddess is a major goddess characterized as a mother or progenitor, either as an embodiment of motherhood and fertility or fulfilling the cosmological role of a creator- and/or destroyer-figure, typically associated the Earth, sky, and/or the life-giving bounties thereof in a maternal relation with humanity or other gods. When equated in this lattermost function with the earth or the natural world, such goddesses are sometimes referred to as the Mother Earth or Earth Mother, deity in various animistic or pantheistic religions. The earth goddess is archetypally the wife or feminine counterpart of the Sky Father or Father Heaven, particularly in theologies derived from the Proto-Indo-European sphere (i.e. from Dheghom and Dyeus). In some polytheistic cultures, such as the Ancient Egyptian religion which narrates the cosmic egg myth, the sky is instead seen as the Heavenly Mother or Sky Mother as in Nut and Hathor, and the earth god is regarded as the male, paternal, and terrestrial partner, as in Osiris or Geb who hatched out of the maternal cosmic egg.

In comparative mythology, sky father is a term for a recurring concept in polytheistic religions of a sky god who is addressed as a "father", often the father of a pantheon and is often either a reigning or former King of the Gods. The concept of "sky father" may also be taken to include Sun gods with similar characteristics, such as Ra. The concept is complementary to an "earth mother".

"Sky Father" is a direct translation of the Vedic Dyaus Pita, etymologically descended from the same Proto-Indo-European deity name as the Greek Zeûs Pater and Roman Jupiter, all of which are reflexes of the same Proto-Indo-European deity's name, *Dyēus Ph₂tḗr. While there are numerous parallels adduced from outside of Indo-European mythology, there are exceptions (e.g. In Egyptian mythology, Nut is the sky mother and Geb is the earth father).

The ancient Egyptian calendar – a civil calendar – was a solar calendar with a 365-day year. The year consisted of three seasons of 120 days each, plus an intercalary month of five epagomenal days treated as outside of the year proper. Each season was divided into four months of 30 days. These twelve months were initially numbered within each season but came to also be known by the names of their principal festivals. Each month was divided into three 10-day periods known as decans or decades. It has been suggested that during the Nineteenth Dynasty and the Twentieth Dynasty the last two days of each decan were usually treated as a kind of weekend for the royal craftsmen, with royal artisans free from work.

Because this calendrical year was nearly a quarter of a day shorter than the solar year, the Egyptian calendar lost about one day every four years relative to the Julian calendar. It is therefore sometimes referred to as the wandering year (Latin: annus vagus), as its months rotated about one day through the solar year every four years. Ptolemy III's Canopus Decree attempted to correct this through the introduction of a sixth epagomenal day every four years but the proposal was resisted by the Egyptian priests and people and abandoned until the decree by Augustus in 25 BC that established the Alexandrian or Coptic calendar. The introduction of a leap day to the Egyptian calendar made it equivalent to the Julian calendar, although (like the latter) it continues to diverge from the Gregorian calendar at the turn of most centuries.

Nephthys or Nebet-Het in ancient Egyptian (Ancient Greek: Νέφθυς) was a goddess in ancient Egyptian religion. A member of the Great Ennead of Heliopolis in Egyptian mythology, she was a daughter of Nut and Geb. Nephthys was typically paired with her sister Isis in funerary rites because of their role as protectors of the mummy, with her brother Osiris, and as the sister-wife of Set.

She was associated with mourning, the night/darkness, service (specifically temples), childbirth, the dead, protection, magic, health, embalming, and beer.

This is a list of earth deities. An Earth god or Earth goddess is a deification of the Earth associated with a figure with chthonic or terrestrial attributes. There are many different Earth gods and goddesses in many different cultures and mythology. However, Earth is usually portrayed as a goddess. Earth goddesses are often associated with the chthonic deities of the underworld.

In Greek mythology, the Earth is personified as Gaia, corresponding to Roman Terra, Indic Prithvi, etc. traced to an "Earth Mother" complementary to the "Sky Father" in Proto-Indo-European religion. Egyptian mythology have the sky goddesses, Nut and Hathor, with the earth gods, Osiris and Geb. Ki and Ninhursag are Mesopotamian earth goddesses.