Video of Loughcrew Spring Equinox March 2005

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Loughcrew Video - Spring Equinox 2005

On the morning of March 23rd, I was inside the chamber of Cairn T to witness the spring equinox sunrise illuminate the backstone. Click on the link below to view a video of the event which has been compressed from 50 minutes to 40 seconds. The file is 3.8mb in size and is in WMV format (Windows Media Video).

Loughcrew Video

I also photographed the progression of the sunbeam across the backstone at regular intervals, click here to view the images.

Sunbeam - March 2005

Equinox Sunrise at the Gossan Stones

Video of Loughcrew Spring Equinox

Sun Equinox

Light Years Ago 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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