June 21, 2011 by NatureGirlStudio
From: www.spaceweather.com
SOLSTICE SOLARGRAPHS: Last December, the staff of the Philippus Lansbergen Observatory in Middelburg, the Netherlands, invited members of the general public to join them for a solargraph-making party. A solargraph is a simple pinhole camera made from a soda or beer can lined with a piece of photographic paper. About a 100 cans were deployed around the observatory and, six months later, here are the results:
Each blue square shows the daily path of the sun across the skies of the Netherlands. The lowest arcs were traced by the winter sun of Dec. 2010. The highest arc was made by the sun just yesterday, June 19th, only two days before the 2011 summer solstice. Occasional gaps are caused by clouds.
“As you can see,” says a member of the observatory staff, “we had one of the sunniest springs ever in our province. It was even sunnier than in southern Spain!”
6-month Solargraph How-to Guides: #1, #2, #3