A visual learning guide
These weird pictures capturing the sun from the shortest to longest day of the year were shot with homemade cameras made from beer and soda cans. About 100 pinhole cameras were put around the Philippus Lansbergen Observatory in Holland on Dec. 21, 2010, as part of a public experiment. The images show the sun's progress across the sky. (Photos: Philippus Lansbergen Observatory/National Pictures)
The photos show clearly how high the sun climbs in the sky at different times of the year. The lowest arcs were traced by the winter sun in December 2010, according to Spaceweather.com
, where you can see images from all the pinhole cameras. The highest arc was made by the sun on June 19, only two days before the summer solstice. Occasional gaps are caused by clouds. Each camera, which is called a solargraph, was made from an empty can, black electrical tape and photographic paper. The pinhole camera, which can also be made using an empty plastic film cannister, was then left outside, facing South for six months and protected from the elements. After six months, the camera was dismantled and the paper was scanned into Photoshop, where altering the contrast revealed the stunning result.
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