This six month long exposure compresses the
time
from solstice to solstice
(~ December 21, 2008 to June 20, 2009) into a single
point of view.

Dubbed a solargraph, the
unconventional
picture was recorded with a pinhole camera
made from an aluminum can lined
with a piece of photographic paper.

http://www.astronet.ru/db/msg/1235296/