Stone Age astronomy in Ireland

The Imax documentary “Solar Max” calls it “the oldest room in the world, older than the pyramids.” An ancient room in County Sligo, Ireland, in a mound called Newgrange, is lit up by the rising sun of winter solstice. This ancient alignment was noticed only in 1967.

Since this very special alignment shines the sun’s rays across a bowl, I wonder if anyone has filled the bowl with water at winter solstice to observe the effects.

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