Berwyn, IL's night sky, measured from orbit

Berwyn's sky measures suburban here. Light dome dominates much of the sky. Only the brightest stars and planets stand out clearly. Only 84.7% of the 3,206 cities measured here read darker than Berwyn.

Note the source: a satellite reading of upward light, not a visual Bortle scale reading. The two measure related but different things.

How far Berwyn is from a meaningfully darker sky

Justice, IL, about 6 miles away as the crow flies, measures in the suburban edge band, one step darker than Berwyn. Actual driving distance will run longer than that straight-line figure.

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

How Berwyn compares nationally

Berwyn, IL counts roughly 55,152 residents, among the 3,206 US cities this site tracks. Berwyn places 2,699 of 3,206 cities in this dataset's darkest-to-brightest order.