5,000-Year-Old Astronomical Clock of Ireland

Megalithic Solstice Simulator

Constructed circa 3200 BC — 500 years before the Great Pyramid of Giza.
Simulate the exact solar angles as the midwinter dawn beam enters the roofbox, travels 19 metres into the darkness, and illuminates the triple-spiral chamber in gold.

Astronomical Alignment:
Newgrange Passage Tomb · Brú na Bóinne

Winter Solstice Alignment

Chamber Alignment: 100% Illuminated in 24k Gold

08:58 AM (Dawn)
06:00 (Dawn) 12:00 (Noon) 18:00 (Dusk)
Sun Elevation +1.8°
Solar Azimuth 135.5° SE
Passage Penetration 19.0 metres
Chamber Illumination 100%

Architectural Engineering (3200 BC)

The builders positioned a specialized opening (the "roofbox") 2.4 metres above the main entrance. Because the passage rises 2 metres from entrance to chamber, only the dawn solstice sun at an exact angle of +1.8° can pierce the roofbox and strike the triple-spiral backstone.

Speaking Stones by Elaine Leigh
Fine Art Exhibition Pairing

The Solstice Sunbeam at Newgrange

Limestone chalk & 24k gold leaf on linen

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