Ancient astronomy becomes coherent when environment, architecture, and portable optical media are considered together. Cultures in sky dominant environments such as open ocean, desert, and high latitude regions developed advanced naked eye astronomy without writing or optical instruments. Cultures in sky obstructed environments such as forests, mountains, humid basins, and dusty river valleys only achieved high precision when they also possessed writing or equivalent record keeping, optical materials such as mirrors or crystal beads, or architectural light control such as dark rooms, shafts, and slits. This paper applies the model to Polynesia, desert and high latitude cultures, the Maya, Egypt, Mesopotamia, India, China, Neolithic Atlantic Europe, and the Inca. The Inca receive a dedicated section because they combine a non alphabetic record system with optical architecture and a difficult observational environment. The model predicts where astronomy should appear based on geography and explains gaps in the archaeological record without invoking lost civilizations or extraterrestrial intervention.
Jason Barnhart (Thu,) studied this question.