Originally posted by karoly aczel
As regards to astronomy I cant see one blanket reason for why different ancient cultures were proficient in astronomy.
I gave several blanket reasons. Which part did you not understand?
Stone Henge has already been mentioned, but why such large, surely difficult to move stones were used is often overlooked.
Its not easy to overlook. What makes you think it is often overlooked? I thought it was one of the first questions anyone asks when they see such monuments. And there are various good possible answers, the main one being status/prestige. Witness how many statutes/iconic buildings we have in the modern world probably for more or less the same reasons.
The pyramids of Giza were also built along very prominent constellations, which would have taken extra time to plan with such precision.
References? Remember that writers about such monuments typically greatly exaggerate precision and alignment to astronomical observations.
I've read that not long ago (last 100 years) a so-called primitive tribe (the Dogon tribe ?) was discovered in Africa who seemed to live like tribal cultures from thousands of years ago. They had the bare minimum for survival except for an excellent knowledge of astronomy . They said there was a second planet circling the star called Sirius which could not be detected by the science of the time. Subsequent advancements in astronomy have revealed their knowledge to be true.
References? And what about the first planet? Wikipedia says Sirius is a double star and that no planets have been detected around either, and that there is a third star behind the pair that is unrelated.
As I said, exaggeration is common, so check your sources.
Anyway it seems that different ancient cultures had totally different reasons for knowing astronomy and to say that it was good for measuring cycles of time is a fair reason, but why the pyramids were built to mirror huge constellations is still a mystery.
Odd then that Wikipedia does not have 'constellation' anywhere on the page on the Great Pyramid of Giza. Maybe the mystery is where you got that information, not why they did it.