The pyramids have long fascinated Robert Bauval. He is Egyptian, born in Al-Iskandariyya (Alexandria) to Belgian parents, and has spent most of his life living and working in the Middle East. For many years he had pondered over the significance of Sah, the constellation of Orion, and its link to the pyramids. One night, while working in Saudi Arabia, he took his family and a friend's family up into the sand dunes of the Arabian desert for a camping expedition.
Bauval knew that the seemingly inconsistent layout of the three Fourth Dynasty pyramids at Giza was no accident, and had applied his own engineer's mind, and those of many friends to the problem. Most agreed that the alignment, though unusual, was no accident, given the precise mathematical knowledge that the Egyptians had.
His friend, a keen amateur astronomer, pointed out Orion, and mentioned, in passing, that Mintaka, the smaller more easterly of the stars making up Orion's belt was offset slightly from the others. Immediately Bauval saw the answer -- the three Belt Stars were aligned in exactly the same way as the three pyramids!
Bauval checked the alignment in 2450 BCE by precessing the three Belt Stars back, and found that, due to their close proximity in space, great distance from Earth, and negligible proper motion, they looked exactly the same then as they do today. Of course, they had changed in declination -- then they were just below the celestial equator, at about -1 degree declination.
The pyramids were a mirror image, the Earthly representation of the Belt of Orion, the destination of the dead King! The Egyptians were dualists -- everything they thought and believed was a duality. Everything had its counterpart, cause and effect, left and right, East and West, death and rebirth -- nothing was ever seen in isolation. They had constructed at Giza an exact replica of the Duat destination of the King. Far from being a tomb, the pyramid was the starting point of the King's journey back to the stars from whence he came, back to the First Time.
Bauval initially made use of the astronomy program Skyglobe 3,5 for the PC. Though too inaccurate for serious work -- it does not take proper motion, nutation, refraction, for example, into account -- it was sufficient to clarify Bauval's mind as to the value of his discovery. Skyglobe 3,5 will plot the Milky Way on its charts if requested, and doing so added further proof to Bauval's theory. Giza is West of the Nile -- putting the plane of our galaxy into the equation showed that Orion is "West" of the Milky Way, in proportion to Giza and the Nile.