General situation and constellation of pyramid of khufu

The four sides at the bottom of the pyramid of King Khufu are almost due north, due south, due east and due west, and the error is less than 1 degree. Although the orientation is determined by observing the stars, the error observed by naked eyes can be less than 1 degree. Back in 2500 BC, it was found that there were four tunnels pointing to four special stars crossing the meridian at that time. They are the second star in Ursa minor, the brightest first star in Canis major, Sirius, Polaris and the first star in Draco major. Using computers, we proved that around 2500 BC, the four tunnels of the Great Pyramid were aimed at four stars respectively. We also know that the correspondence between the tunnel and the star ended relatively because of the constant change of transverse latitude, which is only about a century. This phenomenon makes use of the "precession" in astronomy.

Back to BC 1050 by computer simulation, the arrangement of the three waist stars of Orion crossing the meridian in the sky is the same as that of the three pyramids of Giza on the ground, and the position distribution of the Star River in the sky and the Nile River on the ground is also completely symmetrical. This correspondence between heaven and earth is not accidental coincidence.