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One of the best and the most amazing adventures I had was in the Algerian Sahara in december 2010. With a large group of Algerians in 4 buses arranged by an algerian travel agency we headed for Beni Abbes and also made a tour to Taghit. The world's largest sand dune is here in Taghit and it was awesome to visit. Photo is taken by a friend traveller.

Osiris, lord of the dead. His green skin symbolizes re-birth. God of the afterlife.

Osiris ( /oʊˈsaɪərɨs/; Ancient Greek: Ὄσιρις, also Usiris; the Egyptian language name is variously transliterated Asar, Asari, Aser, Ausar, Ausir, Wesir, Usir, Usire or Ausare) is an Egyptian god, usually identified as the god of the afterlife, the underworld and the dead. He is classically depicted as a green-skinned man with a pharaoh's beard, partially mummy-wrapped at the legs, wearing a distinctive crown with two large ostrich feathers at either side, and holding a symbolic crook and flail.

Osiris is at times considered the oldest son of the Earth god Geb, and the sky goddess Nut, as well as being brother and husband of Isis, with Horus being considered his posthumously begotten son. He is also associated with the epithet Khenti-Amentiu, which means "Foremost of the Westerners" — a reference to his kingship in the land of the dead. As ruler of the dead, Osiris is also sometimes called "king of the living", since the Ancient Egyptians considered the blessed dead "the living ones".

Osiris is first attested in the middle of the Fifth dynasty of Egypt, although it is likely that he is worshipped much earlier;the term Khenti-Amentiu dates to at least the first dynasty, also as a pharaonic title. Most information we have on the myths of Osiris is derived from allusions contained in the Pyramid Texts at the end of the Fifth Dynasty, later New Kingdom source documents such as the Shabaka Stone and the Contending of Horus and Seth, and, much later, in narrative style from the writings of Greek authors including Plutarch and Diodorus Siculus.

Osiris is not only a merciful judge of the dead in the afterlife, but also the underworld agency that granted all life, including sprouting vegetation and the fertile flooding of the Nile River. He is described as the "Lord of love", "He Who is Permanently Benign and Youthful"and the "Lord of Silence". The Kings of Egypt were associated with Osiris in death — as Osiris rose from the dead they would, in union with him, inherit eternal life through a process of imitative magic. By the New Kingdom all people, not just pharaohs, were believed to be associated with Osiris at death if they incurred the costs of the assimilation rituals.

Through the hope of new life after death Osiris began to be associated with the cycles observed in nature, in particular vegetation and the annual flooding of the Nile, through his links with Orion and Sirius at the start of the new year. Osiris was widely worshiped as Lord of the Dead until the suppression of the Egyptian religion during the Christian era.
WIKIPEDIA

The hieroglyph that represented the sky depicted the heavens as a physical ceiling with the edges dropping down at the edges, to replicate the illusion of the sky reaching down to the horizon. It was often shown decorated with stars, to mirror reality.

The sky was a popular motif in various architectural motifs, especially in Egyptian tombs. The ceiling of tombs were often painted blue and decorated with golden stars. It was also placed at the top of walls, door frames and gateways to symbolize the heavens overhead. The arching top of funerary stelae also suggested the curvature of the sky.

The sky was personified by the goddess Nut, who was believed to arch her body over the earth. She held herself up on the tips of her fingers and toes. She was supported by her father Shu and other miscellaneous deities. These attendants were symbolized by the was scepters in a geometric framing device incorporating the sky and the earth. In the New Kingdom and the Late Periods, the king was often shown holding up the sky hieroglyph, and therefore symbolically upholding the gods and Ma'at.

The Egyptian symbol for the stars was a symbol five-pointed line drawing, resembling the sea stars (aka "starfish") that inhabited the Red Sea. In older examples, the drawing has rounder ends and the center is marked by two concentric rings. Egyptian star charts and decan tables often used dots or circles, as well as the hieroglyph. Many tombs also featured deep blue ceilings dotted with bright yellow stars in the exact image of the hieroglyph in hopes to make the ba feel at home in its new dwelling place. The stars were called the "Followers of Osiris" and represented the souls in the underworld.