Louisville, CO Night Sky Brightness
Louisville, CO's night sky, measured from orbit
Louisville 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. Only 9.4% of the 3,206 cities measured here read darker than Louisville.
Note the source: a satellite reading of upward light, not a visual Bortle scale reading. The two measure related but different things, explained in the Bortle scale guide.
Where to go for a darker sky near Louisville
The closest place in this dataset with a meaningfully darker sky is Evans, CO, roughly 34 miles away in a straight line, rated dark sky. Road distance will be more.
Evans, CO is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Louisville compares nationally
Louisville, CO counts roughly 20,811 residents, among the 3,206 US cities this site tracks. Louisville's position, 301 of 3,206, darkest to brightest, comes from the sampling method the methodology guide sets out.