Adjusting street lamps and other exterior lights to allow the stars to shine more brilliantly – that's part of the process for becoming a certified Dark Sky community. More than 200 places in 22 countries around the world have this designation. 

Advocates say limiting light pollution helps preserve expansive views of the night sky, and helps nocturnal creatures thrive. And the Colorado Tourism Office believes the Dark Sky designation helps attract visitors.

Town leaders in Grand Lake recently took the first steps toward becoming an official Dark Sky community. They would join five other towns in Colorado that already have that designation. About two dozen more Dark Sky places are in the pipeline, including communities and parks across the state.

Aaron Watson is with the group DarkSky Colorado. He joined host Erin O'Toole to discuss the problem with light pollution, and why a growing number of Colorado towns are taking the idea of dark skies so seriously.

Read more about the overview effect that Watson mentions near the end of the conversation.