What the night sky looks like over Blue Island, IL

Blue Island reads as urban on this dataset's scale. Sky glow overhead most nights. Typically only planets, the Moon, and a handful of the brightest stars are visible. Blue Island's sky is brighter than 94.3% of the 3,206 cities in this dataset.

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 Blue Island

Riverdale, IL, about 3 miles away as the crow flies, measures in the suburban band, one step darker than Blue Island. Actual driving distance will run longer than that straight-line figure.

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

Blue Island against the rest of the dataset

About 21,805 people live in Blue Island, IL, sized enough to appear in this dataset of 3,206 incorporated US cities. Among all 3,206 cities here, Blue Island ranks 3,006 from darkest to brightest, 1 being the darkest measured.