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'Everything we found shattered our expectations': Archaeologists discover first astronomical observatory from ancient Egypt…
https://www.livescience.com/archaeology/ancient-egyptians/everything-we-found-shattered-our-expectations-archaeologists-discover-1st-ancient-astronomical-observatory-from-ancient-egypt
East-facing entrance, marked by a traditional gateway known as a pylon, leads to a spot where sunlight would have illuminated where the sky observer —known as 'smn pe' and who was usually a priest —stood to track the sun and stars, Ghonim said; the structure still has a carving of smn pe facing the rising sun.