This may have been here before -- at least I know I saw it somewhere. Anyway, it resurfaced and kind of interesting. 6 month pinhole exposure:
http://www.stumbleupon.com/su/19UiX...og/2009/01/photographys-longest-exposure.html
http://www.stumbleupon.com/su/19UiX...og/2009/01/photographys-longest-exposure.html