Some people believe the pyramids were built according to the position of the stars.But many historians dismiss this idea as they dont seem to point to anythi specific.
Astronomers will tell you that the earth wobbles on its axis over a period of 27,000 years.So the position of the stars have long since shifted from the time of ancient Egypt.
At the time of the Pharaohs,the corridors of the King's chamber in Cheops, would point with remarkable accuracy to an important point in the sky.
The sloping passages were designed to guide the Pharaoh's spirit to rise up to heaven.
the point they were aiming for was to do with eternal life.
The Egyptian astronomer priests realised that certain points in the sky never changed.
The northern circum-polar stars (Ursa Major) are always visible.
So, they were the first to have an idea of heaven in the sky.
They also saw Mercury as the god Seth, Venus as Isis and Mars as Horus.
Some New Age Mystics have an idea that the ancient Egyptians may have been visited by extra-terrestrials.
These aliens then built the pyramids and passed on their
knowledge.
These notions made popular by books such as 'Chariots of the Gods'.
But in reality these ideas are nonsense.