Light intensity — 0–10% dark · 10–30% faintly dim · 30–60% dim · 60%+ bright. Less is better.
Click a point → the map zooms toward it.
Bortle scale
Astronomer John Bortle's light-pollution scale, built on 50+ years of observation: 1–2 is the darkest sky, 8–9 heavy city light. Dark areas in the north generally fall in the 3–5 band.
1 · dark9 · city
21 locations
Each point's GPS coordinate, success rate and recommended Kp threshold.