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Ancient tomb captured the Sun & Moon
It's been called a "lightbox," a man-made ancient aperture in a tomb that accurately tracks the movement of celestial bodies on the darkened chambers inside.
The BBC reported Wednesday that the third of such phenomena has been discovered in Ireland by a researcher and artist from County Sligo.
Earlier this year, the network reported on the discovery of a similar "lightbox" in Scotland by archaeologists from Glasgow University. That prehistoric, manmade formation captured the rays of the Sun at the start and end of the winter.
But the new discovery in Ireland, found by Martin Byrne at Carrowkeel, is even more elaborate than the other two known lightbox tombs. Not only does it capture the Sun's beams for three months in summer, the aperture is designed to capture the beams of the setting, full Moon at the winter solstice. The most complex of those discovered, the Irish "lightbox" reveals "astonishingly-detailed astronomical knowledge of the ancient people," said the BBC.
The tomb is believed to originate in the Neolithic era 6,000 years ago, set into a cairn in one of the most scared regions of ancient Ireland. Capturing moonbeams inside the chamber of the tomb apparently was no accident on the ancients' part, Byrne believes. The cairn faces a hill known as
Knocknarea, which means "Hill of the Moon." Other nearby landmarks also take their names from lunar roots.
And the new discovery indicates that not only were the ancients accurate in their fashioning of the lightbox, they were also patient. "Building it would have required many years of observations of the motions of the Moon by the tomb's architects," says Byrne. The tomb points to the most northerly point the setting Moon reaches on the horizon, an event that only happens every 18.6 years.