Click the map (or press Use mine) to set your location. We’ll read off your Bortle class from the light-pollution overlay and rank the catalogue by altitude and suitability. Override the Bortle dropdown if you disagree with the estimate.
Bortle visual key →
B1
B2
B3
B4
B5
B6
B7
B8
B9
Click the map (or press Use mine) to drop a pin — the targets list will appear below.