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Unless otherwise stated, this image is the copyright of the submitter. Contact them for permission to reproduce it. |  | | Description | View showing how Maen Llia "points" at the centre of the star trails, otherwise known as the North Celestial Pole.
Polaris, the present day North star, is not in the exact centre, and can be seen as the shortest trail.
This image is composed of several hundred 30 second's long exposures. ISO 400. Tungsten white balance. Raw format . Manual exposure. 16mm focal length, set to infinity.
The image was then converted to an Infra red image in Photoshop Elements. |
| Posted Comments: Martin L
(2012-10-01) | Thanks for this magnificent image Cerrig. | cerrig
(2012-10-01) | You're welcome Martin. All the info on how to go about this I found on the web, and by messing up many times. It's quite involved. | bat400
(2012-10-02) | It is indeed a wonderful photograph. But I'm also interested in your caption... is it literal, and if so, from what vanatage point? | cerrig
(2012-10-02) | The top right slope on the stone is the one that points to the centre of the star trails. If you were stood in the bottom right corner of the photo, and you followed the line of the top right slope, you would be looking at the centre, because it slopes upward at an angle that matches the latitude of the site, (just under 52 degrees)
The best view of the slope is from the left here, the best view of the alignment is from the bottom right here. This is the compromise view that attempts to include some of both views.
Maen Llia is, literally, the original horizontal sundial, and it has been showing the moment of "local noon"precisely, ever since it was erected.
| bat400
(2012-10-03) | I understand. You're saying that surface is the edge of a roughly perpendicular plane to the ground and a 52 deg edge from the horizontal (ground) plane, pointed north. Thanks. |
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