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Projective Sundial
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Solar Calendar

Make a hole in the wall

Negative Sundials

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Solar Calendar.

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Time curve.

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Location.

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Équinox

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Holy week

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Leap year

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Geographic Coordinates

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The sun doesn' t shine at the same height during the year, as we are in the north hemisphere, the sun shines “lying” in wintertime contrary to the summertime. This makes it project at a different height on the wall of the cosmic room.
For example, this graph was taken in wintertime. The sunlight moves leaning around forty-five degrees at latitude twenty, so the length of the mark is not enough. The higher the sun is, the bigger the mark will be.
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This was taken on February 5th , the mark is lower.
This picture is of an equinox.
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This picture was taken on April 9th.

On that very 9th of April in the daytime, the sun is going down perpendicular on the south wall.

 

 

 

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