Robert Bauval postulated that the Three Pyramids of Giza are aligned with the three stars in Orion’s Belt. Orion is the constellation that is named after Orion, the celebrated hunter in Greek mythology.
Those three stars were aligned with the Three Pyramids of Giza at the time the pyramids were built. Those three stars are not aligned in modern times.
The reason for the change in position is precession. The Earth has three motions. The Earth rotates on its axis once every 24 hours. The Earth rotates around the sun once every 365 days which comprises a calendar year. However, at the Earth rotates on its axis it wobbles, like a gyroscope. Therefore, the stars today do not appear in the same position as they did in ancient times.
The pyramids in Mexico are also aligned with the three stars in Orion’s Belt
Lastly, the Hopi Indian settlements in the Southwestern U.S. are also aligned with the three stars in Orion’s Belt.
Did these ancient civilizations communicate with each other?
Did they share a common ancient religion?
Perhaps future research will provide the answers?