Groton, CT's night sky, measured from orbit

Groton reads as rural on this dataset's scale. Little local light dome. Most stars are visible; the Milky Way is faint but often findable away from town lights. Groton's sky is brighter than 12.1% of the 3,206 cities in this dataset.

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

The nearest darker sky to Groton

Fall River, MA, about 57 miles away as the crow flies, measures in the dark sky band, one step darker than Groton. Actual driving distance will run longer than that straight-line figure.

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

How Groton compares nationally

Groton, CT counts roughly 10,160 residents, among the 3,206 US cities this site tracks. Groton places 386 of 3,206 cities in this dataset's darkest-to-brightest order.