Brilliant stuff George.

Did you look at Thornborough?
I'd be keen to know what you make of the claimed orientations below.
I think the paper (2006) is available on academia.

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Now a new study recently completed by Dr Jan Harding, Senior Lecturer in Archaeology at Newcastle University, provides important new information..

.."This study", reports Dr Harding, "provides detailed insights into Neolithic religion and the values placed on favoured celestial phenomena. The same objects in the sky are being picked out as important for a period of around 1500 years ~ a length of time equivalent to that between the end of Roman Britain and the present day..

One of the earliest monuments, a giant elongated enclosure or cursus, about half of which has been destroyed by quarrying, was most likely built between 3500 BC and 3000 BC. This appears to have been deliberately orientated towards the midsummer solstice sunrise, to the east, and towards the setting of the three stars which make up the well known constellation of Orion's Belt, to the west. This early monument was replaced after 3000 BC by three giant circular earthwork enclosures or henges, each around 240 metres in diameter. All three henges are interrupted by a pair of entrances, all on a shared axis and aligned on the midwinter solstice sunrise. The entrances also frame the rising of Sirius, the sky's brightest star, and again, the associated constellation of Orion's Belt.
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