Michael Chrisman’s year-long exposure of the Toronto skyline, 2011. The trails in the sky show the path of the sun.

The image is of a solargraph taken with a pin-hole camera exposing sensitized paper and is not developed:

There is no need to use chemicals to bring up the image. After so long, it is there on its own and visible to the naked eye.

It reminds me of Tom Thomson’s paintings of the northern lights.

Click through for more about how Chrisman created the photo or follow him on Twitter.