The Orion correlation theory is a fringe theory in Egyptology attempting to explain the arrangement of the Giza pyramid complex. It posits that there is a correlation between the location of the three largest pyramids of the Giza pyramid complex and Orion's Belt of the constellation Orion, and that this correlation was intended as such by the original builders of the Giza pyramid complex. The stars of Orion were associated with Osiris, the god of rebirth and afterlife by the ancient Egyptians. Depending on the version of the idea, additional pyramids can be included to complete the picture of the Orion constellation, and the Nile river can be included to match with the Milky Way. The idea was first published in 1989 in Discussions in Egyptology, volume 13. It was the subject of the book The Orion Mystery, in 1994, as well as a BBC documentary, The Great Pyramid: Gateway to the Stars (February 1994), and appears in some New Age books. The Orion correlation theory was put forward by Robert Bauval, and mentioned that Mintaka, the dimmest and most westerly of the stars making up Orion's belt, was offset slightly from the others. Bauval then made a connection between the layout of the three main stars in Orion's belt and the layout of the three main pyramids in the Giza pyramid complex. He published this idea in 1989 in the journal Discussions in Egyptology, volume 13. The idea has been further expounded by Bauval in collaboration with Adrian Gilbert (The Orion Mystery, 1994) and Graham Hancock (Keeper of Genesis, 1996), as well as in their separate publications. The basis of this idea concerns the proposition that the relative positions of three main Ancient Egyptian pyramids on the Giza plateau was by design correlated with the relative positions of the three stars in the constellation of Orion which make up Orion's Belt, as these stars appeared in 10,000 BC. Their initial ideas regarding the alignment of the Giza pyramids with Orion: "...the three pyramids were a terrestrial map of the three stars of Orion's belt" are later joined with speculation about the age of the Great Sphinx.