Loughcrew Autumn Equinox 2004
Waiting for the sunrise outside Loughcrew Cairn T on 21st September 2004
The sun finally breaks through the low cloud at 7:20am. The photograph was taken by the side of Cairn T looking east.
This image photographed at 7:27am shows the beam of equinox sunlight illuminating the left side of the backstone.
This image photographed at 7:32am shows the sunbeam illuminating the centre of the backstone. The dark patch in the centre is a shadow from part of the iron gate at the entrance to the cairn.
Iron gate at entrance to Loughcrew Cairn T.
This image photographed at 7:55am shows the sunbeam moving off the backstone and illuminating the stones to the front and side of the back recess.
In this image photographed at 8:13am the sunbeam has move to the right of the backstone. Notice the sun symbol illuminated on the front stone of the recess.
Light Years Ago: A Study of the Cairns of Newgrange and Cairn T Loughcrew, Co. Meath, Ireland
by Tim O'Brien shows that the symbols of the sun
engraved on the backstone of Cairn T at Loughcrew are precisely
positioned to measure solar movement. A beam of light from the rising
sun around the time of the March and September equinoxes is mapped on the backstone.
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Loughcrew Video - Spring Equinox 2005
The progress of the sunbeam on the backstone inside Cairn T at Loughcrew was video recorded at sunrise on the morning of March 23rd 2005. The 50 minute video has been compressed to 1 minute 46 seconds and included in the following YouTube Video.Gossan Stones Equinox Sunrise Alignment
The Equinox Sunrise is framed by the Gossan Stones in the Wicklow Mountains.
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