I've not read this thread - but will just jump in. Thom's interpretation of the layout of greater Avebury circle has been derided as fanciful. Yet it is perhaps one of the best ground surveys. The alignments within the monument, to points on the horizon, via other monuments sometimes, were fundamental. It's just a pity that there is so much attention on the solar aspects and so little on the lunar. But, then, that's also the criticism of our dominant culture presently.

And, by the way, the moon's near perigee, and full tomorrow.