Light Pollution

In the photo on the left, we see how the sky from Todd Carlson's home in Goodwood, Ontario looks on a normal night, glowing with stray light from the typical manmade lighting found throughout most modern populated areas. On the right, Todd captured what the sky looked like from the same spot during a widespread power outage on August 14th, 2003.

source: http://www.illinoislighting.org/loss...