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Loughcrew Equinox

Loughcrew Equinox - Cairn T
At the 5000 year old Loughcrew megalithic cairn T in Ireland, the rising sun on the mornings around the equinoxes (March and September) illuminate the passage and chamber. The backstone of the chamber with its engraved sun symbols is bathed in a blaze of golden light during the 50 minute illumination. More ....
Equinox September 2009 Autumn Equinox - September 2009

All those who made the effort to get up early on Sunday the 20th September were rewarded by a glorious sunrise that illuminated the backstone inside the chamber of Cairn T. The atmosphere was friendly and relaxed and everybody got to spend time in the chamber and witness first hand the illumination of the backstone. More...


Spring Equinox - March 2009

The mornings were foggy leading up the the equinox, so a relatively small group gathered around 6:30am at Cairn T on Friday 20th March. Their optimism was rewarded and the equinox sunrise broke through the fog to illuminate the chamber and backstone.  More...
Equinox - March 2008


Equinox September 2008 Autumn Equinox - September 2008

The conditions on Monday the 22nd of September were perfect for the rising sun to illuminate the passage and chamber of Cairn T at Loughcrew. Many thanks to Clare Tuffy for the beautiful photographs. More...


Spring Equinox - March 2008

The best morning was the 22nd which was a near perfect sunrise, when the sun rose above a little low cloud, Cairn T was brilliantly illuminated, rewarding the hardy souls that braved the arctic winds and sub zero temperatures.  More...
Equinox - March 2008


Loughcrew 2007 Autumn Equinox - September 2007

It was a misty dawn on the 22nd September 2007 at Loughcrew. The sun did break through the morning mist to illuminate the backstone, much to the delight of the 60 people who gathered at Cairn T.  More...


Autumn Equinox - September 2006

The rising sun illuminates the passage and chamber of the megalithic Cairn T at Loughcrew around the March and September equinoxes. Many thanks to Ken Williams for the featured photographs from the morning of 22nd September 2006. More...
Equinox


Loughcrew Equinox September 2005 Autumn Equinox - September 2005

Images by Ken Williams, beginning with the sunrise at 7:20am, four great photographs of the equinox sunbeam illuminating the backstone of Cairn T and finishing off with a photography of the chamber at 8:17am where the sunbeam has moved off the backstone.  More...


Spring Equinox - March 2005

Due to adverse weather conditions on the 20th, 21st and 22nd of March the spring equinox sunrise didn't illuminate the chamber of Cairn T at Loughcrew. The sunrise on the March 23rd was a perfect sunrise to illuminate the backstone of the chamber in Cairn T.  More...

The progress of the sunbeam on the backstone inside Cairn T at Loughcrew was video recorded on the morning of March 23rd 2005. The 50 minute video has been compressed to 1 minute 46 seconds and included in a YouTube Video.
Spring Equinox - March 2005


Equinox Sunrise - Loughcrew Cairn T Autumn Equinox - September 2004

The equinox rising sun breaks through the low cloud at 7:20am on the 21st September 2004. The rising sun illunimated the interior of Loughcrew Cairn T from 7:27am to 8:13am.  More...


Spring Equinox - March 2004

This image photographed inside Cairn T at 6:51am shows the shaped beam of equinox sunlight illuminating the back stone. Over a period of about 45 minutes the beam moves to the bottom right corner of the backstone.  More...
Spring Equinox sunbeam


A beam of light illuminates the backstone of Carin T

Autumn Equinox - September 2002

Tim O'Brien in his book Light Years Ago states "It would appear that the construction of Cairn T was specifically designed to cleverly fashion a beam of light from the rising and early risen sun around the time of the equinoxes to define the four year equinox or leap year cycle."  More...


     
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Saint Patrick and the Spring Equinox

Saint Patrick's day is celebrated within a few days of the Spring Equinox, could it be that the Spring Equinox Festival was christianised to Saint Patrick's day and that this knowledge has been lost over time?  More ...


Light Years Ago

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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Light Years Ago by Tim O'Brien

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