Solargraph: Building Guide

Solargraph: Building Guide

            Here's one link on the subject:  http://inatarius.wordpress.com/2009/07/01/solargraph-building-guide/

            Here's one article on the subject from SpaceWeather.com:

                        SOLSTICES IN A BEER CAN: The northern winter solstice is only one day away. In the Netherlands that means it's time to open up a beer can and look inside. Every six months, Jan Koeman of Zierikzee, the Netherlands, deploys a beer-can solargraph to record the progress of seasons, solstice to solstice. On Dec. 18th he cracked his open and this is what he saw:

 

"I made a solargraph using an empty beer tin with a pinhole and photographic paper inside," explains Koeman. "The exposure time is 6 months!"

The highest arcs were traced by the summer sun of June 2013. The lowest arc was made by the sun on Dec. 18th, just three days before the 2013 winter solstice. Occasional gaps are caused by clouds.

"This year I placed my solargraph high and safe on an old Dutch windmill," continues Koeman. "The miller is always busy and we have a lot of wind here, so the spinning wings of the mill are barely visible in the photo."

Readers: Northern winter begins on Dec. 21st at 17:11 UT. Now is the perfect time to deploy your own beer-can solargraph for the next six months. Too young to drink? Soda cans work, too.