For millennia, the Egyptian pyramids puzzled the explorers with many things and not only with their hidden cameras and their secret rooms. But to this day, it is not known exactly how exactly the ancient Egyptians managed to build them without using any modern technology. One of the biggest puzzles is actually even less well known than the rest of the puzzles, and is related to the orientation of the pyramids to the directions of the world - scientists have no idea how the builders have managed to arrange them so perfectly. For example, the Great Pyramid of Pharaoh Hufu in Giza, with its 138.8 meter base, is extremely correct and almost perfectly oriented to the leading cardinal points of the world, north, south, east, and west, even though it has a minimal systematic error .
"The builders of Hufu's great pyramid have directed it towards the world's directions with an accuracy of more than four arc minutes or a fifteenth of degrees," said archaeologist and engineer Glenn Dash. In fact, all three of the great Egyptian pyramids are oriented with extreme precision that is completely unexpected for an era in which there were no drones, drawings, and computers. But now Dash has a new idea he thinks he can explain the orientation. His latest research shows that 45,000 years ago the Egyptians used the autumnal equinox to achieve orientation accuracy. He used the method with a rod, called an ancient gnomon, in which the East-West line can be established with extreme precision. And what's really interesting is that with this method there is a minimal error that is counterclockwise, just as is the minimum error in the orientation of the pyramids.
Source: www.brightside.me