Solargraphy is a photography technique to take extremely long exposure photos of the Sun's movement. Solargraphy cameras are pinhole cameras made from light-proof containers, such as aluminum cans. Cameras are placed in different locations with black and white photo paper inside. They capture light for up to 6 months and then the exposed paper scanned as a negative on a flat-bed scanner. The result is extremely long exposure photos that capture the Sun’s movement through the sky. Small cuts or lack of traces of the Sun indicate overcast weather during the exposure.