I honor of the new location may I post on the related topic of Babylonian astronomy. One of the astronomical questions of great interest to early peoples was to predict the future positions of the Moon. This is a difficult problem because the Moon is affected by both the Earth's and the Sun's gravitation to non trivial degrees. Calculation of lunar positions from his gravitation theory dfeated Newton, and modern accuracy was only obtained by the introduction of infinite dimensional matrices and determinants.
But the Babylonians by recording and correlating the place of rising of the new Moon with respect to the place of rising of the Sun that day, for
700 years,were able to construct a purely algebraic formula for the Moon's position of remarkable accuracy. Indeed their complicated arithmetic transformations have been compared to modern Fourier analysis and statistical filtering! See
http://www.arxiv.org/abs/physics/0310126.
Now lunar positions are extremely important to peoples living on the Atlantic and North Sea coasts of Europe because of the extreme tides that happen there. Is it not conceivable that the pre-Celtic beaker culture people worked at doing what the Babylonians did and used stone circles in the effort? The same device used for observation could be used for calculation; this was not unheard of in ancient times; consider the astrolabe.