The pyramids line up -- more or less -- along this line. The ancient Egyptians aligned their pyramids and temples to the north because they believed their pharaohs became stars in the northern sky after they died.
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Two researchers, Virginia Trimble and Alexander Badawy, found that one of the shafts seems to aim in the general direction of where the north star would've been when the pyramids were constructed. The other shaft, generally, points toward Orion's Belt.
The constellation Orion would be totally unrecognizable as a pattern as the various star are all moving imperceptively slow in different directions and have been doing so for ever. This holds true for every star in the sky. The dinosaurs would have seen nothing in the star patterns as we see today.
But what the Egyptians lacked in tools, they made up for with science and engineering precision. Smith explains that they developed and used the cubit rod to measure and lay out the dimensions of the pyramid; a square level to level horizontal surfaces, and a 3:4:5 framing square to create precision 90-degree angles.
Spence speculates that Egypt's pyramid builders found true north by using a plumb line: when the stars Kochab and Mizar were seen on the same vertical, one was facing north1.
Considering the pyramids were built more than four thousand years ago, the exact technique of construction remains a mystery and modern-day equipment was not available at the time. It is believed that ancient Egyptians ferried the huge stone blocks on the Nile river.
Many people have said that the pyramids would last 1 million years or even until the world ended, but I'd say around 10,000 to 100,000 years based on current observations.
The pyramids line up -- more or less -- along this line. The ancient Egyptians aligned their pyramids and temples to the north because they believed their pharaohs became stars in the northern sky after they died. But while the Great Pyramid is aligned with the north, the other pyramids are all slightly off.