What the night sky looks like over Glen Carbon, IL

Glen Carbon's sky measures rural here. Little local light dome. Most stars are visible; the Milky Way is faint but often findable away from town lights. Only 11.8% of the 3,206 cities measured here read darker than Glen Carbon.

The number comes from orbit, not a stargazer's logbook, so treat it as an estimate of sky glow rather than a certified Bortle class.

The nearest darker sky to Glen Carbon

Godfrey, IL, about 19 miles away as the crow flies, measures in the dark sky band, one step darker than Glen Carbon. Actual driving distance will run longer than that straight-line figure.

Godfrey, IL is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.

Glen Carbon against the rest of the dataset

About 13,883 people live in Glen Carbon, IL, sized enough to appear in this dataset of 3,206 incorporated US cities. Among all 3,206 cities here, Glen Carbon ranks 377 from darkest to brightest, 1 being the darkest measured.