Night Sky and Light Pollution
A real star catalogue. Drag the light pollution slider and watch the stars disappear.
ESO/S. Guisard (www.eso.org/~sguisard) (CC BY 4.0)
Night Sky and Light Pollution
Bortle class
Faintest visible starsmag
Stars visible (whole sky, clear night)
Star positions and brightness from the Yale Bright Star Catalogue. Your location is never stored.
Data table (text alternative)
| Bortle class | Faintest visible stars | Stars visible (whole sky, clear night) |
|---|---|---|
| 1 | 7.8 | 9,093+ |
| 2 | 7.3 | 9,082+ |
| 3 | 6.8 | 9,002+ |
| 4 | 6.3 | 7,008 |
| 5 | 5.8 | 4,103 |
| 6 | 5.3 | 2,319 |
| 7 | 4.8 | 1,267 |
| 8 | 4.3 | 718 |
| 9 | 3.8 | 409 |
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