mega-what / prehistoric horizon calendars / Ireland, Kilkenny

Knockroe Passage Tomb: Luni-solar rises

East centred view with luni-solar trajectories c.3000BCE from Knockroe Passage Tomb, Kilkenny, Ireland. The green line approximates hidden horizon. Winter cross-quarters are at the left foot of a hill, the solstice is in a dip.
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© Michael Wilson.