Add Yahoo as a preferred source to see more of our stories on Google. Astronomers classify night skies from dark to bright using the Bortle Scale, ranked from one to nine. Light pollution is when ...

The growing prevalence of light pollution caused by our accursed civilization created the need for amateur astronomers to classify which areas in the nighttime sky are dark enough for good stargazing.

How dark is your night sky? In Illinois, there are no known Class 1, 2 or 3 dark sky sites. We've obscured them all with our outdoor lights. The Chicago Chapter of the International Dark-Sky ...

Under Lucky Stars, a star map company that allows you to purchase products with star maps based on specific coordinates and dates, has released a list ranking all of the 62 U.S. National Parks ...