
Of the seven wonders of the world, the Great Pyramid of Khufu is perhaps the most wonderful. For centuries it has been the source of countless investigations, mysteries, new age theories, and even astronomical discoveries. There is much myth surrounding this amazing establishment, and archaeologists and astronomers alike are baffled by its complexity and the methodology of its construction. In recent investigations, discoveries suggest the ancient Egyptians may have known much more about astronomy than we had previously believed.
Aside from all metaphysical speculations, the Great Pyramid remains one of the most brilliant structures in the world. Archaeologists still do not know how it was built. The pyramid is in Giza, about 16 kilometers from Cairo, and at 484.9 feet, it was the tallest structure in the world before the Eiffel Tower was built. It is comprised of over two million limestone slabs, each weighing upwards of two or three tons (Fernie).1
The first inquiry into the pyramid’s mystique took place in the ninth century when Al-mamun set out to discover the wealth rumored to be hidden inside the pyramid. The north entrance was so well hidden, Al-mamun and his men were forced to break in by shattering each limestone brick. They stumbled upon a fascinating aspect of the pyramid called the Descending Passage. This tunnel goes straight from the north entrance and slopes slightly downward underneath the pyramid (Fernie). The incredible thing about this tunnel is that it is almost exactly straight. Of course, this fact astonished Al-mamun even as it astonishes us today. How could the Egyptians, without modern tools, have constructed a tunnel with such perfection? This question was so puzzling, that in 1881, a surveyor named Flinders Petrie visited the pyramid to measure its exactness. Using the most modern tools of that time, Petrie discovered the greatest margin of error over the one hundred meter tunnel was a mere seven millimeters (Fernie). This level of perfection has sparked much interest for many astronomers. Some speculate that the Egyptians must have used unknown units of measurement to construct it. Others point to the stars. They note that if a person were to stand at the base of the tunnel and look towards the entrance, he or she would be looking out into the northern patch of the night sky. Currently, the pole star is Polaris, but as a result of what is known as “precession”, the Egyptians would have been looking at a different star entirely. This mystery still has not been solved.
Aside from the unique Descending Passage, astronomers have also been vexed by several other aspects of the Great Pyramid. A somewhat abstract example is the proportions of the pyramid. In the 1800’s, Astronomer Royal of Scotland, Charles Piazzi Smyth became intoxicated with this mystery. He discovered the ratio of the slant of the pyramid to be 10:9. He then took the height of the pyramid (484.9) and multiplied it by 109. This came out to be 91,840,000 miles, a number very close to the distance from the Earth to the Sun (Fernie). Many deem this purely coincidence, but Smyth was faithful in his belief that the product had much more significance. He believed that this meant the Egyptians must have known this distance.
Another example of the Egyptians’ curious knowledge of the heavens is the almost true perfection of the pyramid’s orientation along the sides. The east side of the pyramid lies only three arcminutes from the actual north-south line. Taking into consideration the immensity of the structure and the perfection of this measurement, it suffices to say the Egyptians must have had a good deal of knowledge about celestial poles. According to J. Donald Fernie, “This makes it virtually certain that some astronomical method was used to establish the local meridian” (Fernie). The Egyptians were brilliant enough to use this as a tool to orient the Great Pyramid.
It was noted that the orientation of the pyramids’ sides were slightly different for each. They were built over centuries of time, and astronomers believe that fact holds the key to the Egyptians’ methodology of orientation. In the year 2000, Egyptologist Kate Spence published a paper on her explanation for the pyramids. She said that the Egyptians used two stars to determine which way was north and then oriented the base of the pyramids using that point. She also “showed that the resulting orientation errors varied as a function of time—just as predicted by precession” (Fernie). Therefore, she argues the Egyptians used the stars in the sky to determine the location and direction of the most monumental construction in history.
Indeed the pyramids explain much about the Egyptians and their study of the universe. But more than that, they leave much more to be discovered and many questions to be answered. They are a source of mystery, even to this day. The more scientists learn about the Great Pyramid, the more they find they don’t know. But even with all the mystery and superstition surrounding, and perhaps polluting, the Great Pyramid, astronomers have discovered some concrete ideas about the studies of the Egyptians. First, scientists discovered the Descending Passage which led them to believe that the Egyptians may have used a polar star to build an almost perfectly straight tunnel. Later, Charles Piazzi Smythe discovered the ratio of the pyramids side was 10:9 and found a coincidence with the distance from the earth to the sun. Also, astronomers examined the orientation of the sides of the bases of the pyramids and discovered they must have used the celestial poles in their construction. These were all fascinating discoveries, but none entirely concrete. The mystery surrounding the “scientific” explanations has not net been dissolved.
It is interesting to think that the Egyptians, one of the most innovative civilizations in history, used the stars as guides in every aspect of their lives. Whether it was in the worship of deity, agriculture, or construction, astronomy played a central role in Egyptian society. The Great Pyramid is a perfect example of the ingenuity of the Egyptian civilization and will continue to puzzle astronomers for years to come.
1 This and all other information and quotations are taken from
Fernie, J. Donald. "Astronomy and the Great Pyramid." American
Scientist September 2004. 24 May 2005
.