According to Bauval (author, The Orion Mystery), the Great Pyramid was built in such a way that two of the four shafts emanating from the King's and Queen's chamber are aligned to due north, while the other two are aligned to due south. These four shaft thus target the meridian, which is an imaginary line that joins the north and south poles, passing directly over an observer's zenith. It is believed that in circa 2,500 BC, each one of these shafts targeted a special star as it culminated at the meridian.
From the King's Chamber, the northern shaft (32 degree 28') was aimed at the ancient Pole star, Thuban (Alpha Draconis) in the constellation of the Dragon, which the Pharaohs associated with 'cosmic pregnancy and gestation'. The southern shaft (45 degrees 14') was aimed at Al Nitak (Zeta Orionis), the brightest of the three stars of the Orion's belt, which the ancient Egyptians identified with Osiris, their high god of resurrection and rebirth and the legendary bringer of civilization to the Nile Valley.
From the Queen's Chamber, the northern shaft (39 degrees) was aimed at the star Kochab (Beta Ursa Minor), associated by the ancients with 'cosmic regeneration' and the immortality of the soul, in the constellation of the Little Bear. The southern shaft (39 degree 30') was aimed at the star Sirius (Alpha Canis Major) in the constellation of the Great Dog. The star Sirius was associated by the ancients with the goddess Isis, cosmic mother of the kings of Egypt.
These four stars that the shafts of the Great Pyramid targeted were of ritual importance within the 'Osiris cycle'of beliefs. It is also believed that this particular alignment of the pyramid could not have been accidental, for the position of the four stars changes with time due to the effects of precession.
However, questions arise regarding this view put forward by Robert Bauval. Afterall, this alignment of the shafts with the stars may be pure chance. Also, there are other bright stars in the sky at this declination that could have passed over the shafts during a 24-hour rotation of the sky. Another objection is that the angles quoted by Bauval appear to be questionable. There are significant deviations in the angles of the Queen's chamber shafts as the exit of the northern shaft is not yet known. The omission of these deviations from Bauval's argument indicates an 'unscientific' bias on Bauval's part.