Sunlight - Revision history

C256zhao: fix link

2026-04-05T05:52:58Z

fix link

← Older revision		Revision as of 00:52, 5 April 2026
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	Although solar alignments are not uncommon among passage graves, the [[University of Waterloo Computer Science Club]] is one of few to contain the additional roofbox feature ([[Cairn G]] at [[Carrowkeel Megalithic Cemetery]] is another, and it has been suggested that one can be found at [[Bryn Celli Ddu]].). The alignment is such that although the roofbox is above the passage entrance, the light hits the floor of the inner chamber. Today the first light enters about four minutes after sunrise, but calculations based on the precession of the Earth show that 5,000 years ago first light would have entered exactly at sunrise.		Although solar alignments are not uncommon among passage graves, the [[Computer Science Club\|University of Waterloo Computer Science Club]] is one of few to contain the additional roofbox feature ([[Cairn G]] at [[Carrowkeel Megalithic Cemetery]] is another, and it has been suggested that one can be found at [[Bryn Celli Ddu]].). The alignment is such that although the roofbox is above the passage entrance, the light hits the floor of the inner chamber. Today the first light enters about four minutes after sunrise, but calculations based on the precession of the Earth show that 5,000 years ago first light would have entered exactly at sunrise.

Laden at 21:47, 25 October 2012

2012-10-25T21:47:45Z

← Older revision		Revision as of 16:47, 25 October 2012
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	On 11 July, 2012, sunlight was observed at 4:08 PM.		On 11 July, 2012, sunlight was observed at 4:08 PM.

	On 25 October, 2012, sunlight was observed at 5:45 PM.		On 25 October, 2012, sunlight was observed at 5:45 PM.

Laden at 21:47, 25 October 2012

2012-10-25T21:47:20Z

← Older revision		Revision as of 16:47, 25 October 2012
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	On 11 July, 2012, sunlight was observed at 4:08 PM.		On 11 July, 2012, sunlight was observed at 4:08 PM.
			On 25 October, 2012, sunlight was observed at 5:45 PM.


	==geometry==		==geometry==

Mimcpher at 19:43, 30 September 2012

2012-09-30T19:43:14Z

← Older revision		Revision as of 14:43, 30 September 2012
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	The square of light in the CSC was approximately 15cm high by 20cm wide. It was approximately 150cm off the floor. These are from memory, and need to be re-confirmed. I believe the CSC door being partly open was restricting the width of the square.		The square of light in the CSC was approximately 15cm high by 20cm wide. It was approximately 150cm off the floor. These are from memory, and need to be re-confirmed. I believe the CSC door being partly open was restricting the width of the square.

			Measurements:
			* 162 cm top 177 cm. 32 cm wide 5:13 pm Sept 10



	Although solar alignments are not uncommon among passage graves, the [[University of Waterloo Computer Science Club]] is one of few to contain the additional roofbox feature ([[Cairn G]] at [[Carrowkeel Megalithic Cemetery]] is another, and it has been suggested that one can be found at [[Bryn Celli Ddu]].). The alignment is such that although the roofbox is above the passage entrance, the light hits the floor of the inner chamber. Today the first light enters about four minutes after sunrise, but calculations based on the precession of the Earth show that 5,000 years ago first light would have entered exactly at sunrise.		Although solar alignments are not uncommon among passage graves, the [[University of Waterloo Computer Science Club]] is one of few to contain the additional roofbox feature ([[Cairn G]] at [[Carrowkeel Megalithic Cemetery]] is another, and it has been suggested that one can be found at [[Bryn Celli Ddu]].). The alignment is such that although the roofbox is above the passage entrance, the light hits the floor of the inner chamber. Today the first light enters about four minutes after sunrise, but calculations based on the precession of the Earth show that 5,000 years ago first light would have entered exactly at sunrise.

Dbelange at 23:08, 11 July 2012

2012-07-11T23:08:30Z

← Older revision		Revision as of 18:08, 11 July 2012
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	The square of light in the CSC was approximately 15cm high by 20cm wide. It was approximately 150cm off the floor. These are from memory, and need to be re-confirmed. I believe the CSC door being partly open was restricting the width of the square.		The square of light in the CSC was approximately 15cm high by 20cm wide. It was approximately 150cm off the floor. These are from memory, and need to be re-confirmed. I believe the CSC door being partly open was restricting the width of the square.

			Although solar alignments are not uncommon among passage graves, the [[University of Waterloo Computer Science Club]] is one of few to contain the additional roofbox feature ([[Cairn G]] at [[Carrowkeel Megalithic Cemetery]] is another, and it has been suggested that one can be found at [[Bryn Celli Ddu]].). The alignment is such that although the roofbox is above the passage entrance, the light hits the floor of the inner chamber. Today the first light enters about four minutes after sunrise, but calculations based on the precession of the Earth show that 5,000 years ago first light would have entered exactly at sunrise.

Mimcpher: /* geometry */

2012-07-11T20:28:41Z

geometry

← Older revision		Revision as of 15:28, 11 July 2012
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	==geometry==		==geometry==

	The square of light in the CSC was approximately 15cm high by 20cm wide. It was approximately 150cm off the floor. These are from memory, and need to be re-confirmed.		The square of light in the CSC was approximately 15cm high by 20cm wide. It was approximately 150cm off the floor. These are from memory, and need to be re-confirmed. I believe the CSC door being partly open was restricting the width of the square.

Mimcpher: /* geometry */

2012-07-11T20:27:05Z

geometry

← Older revision		Revision as of 15:27, 11 July 2012
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	==geometry==		==geometry==

	The square of light in the CSC was approximately 15cm high by 20cm wide.		The square of light in the CSC was approximately 15cm high by 20cm wide. It was approximately 150cm off the floor. These are from memory, and need to be re-confirmed.

Mimcpher at 20:25, 11 July 2012

2012-07-11T20:25:54Z

← Older revision		Revision as of 15:25, 11 July 2012
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	On 11 July, 2012, sunlight was observed at 4:08 PM.		On 11 July, 2012, sunlight was observed at 4:08 PM.


			==geometry==

			The square of light in the CSC was approximately 15cm high by 20cm wide.

Mimcpher: Created page with "On occasion, sunlight reflects off the DC, through mathsoc, into the CSC. On 11 July, 2012, sunlight was observed at 4:08 PM."

2012-07-11T20:08:58Z

Created page with "On occasion, sunlight reflects off the DC, through mathsoc, into the CSC. On 11 July, 2012, sunlight was observed at 4:08 PM."

New page

On occasion, sunlight reflects off the DC, through mathsoc, into the CSC.

On 11 July, 2012, sunlight was observed at 4:08 PM.