How dark is the sky in Banská Bystrica Region?
Sky darkness for 9 towns and parks in Banská Bystrica Region, worked out from NASA satellite images of light at night (2025). 5 of them have skies of Bortle 4 or darker, where the Milky Way shows overhead. The darkest is Muránska planina National Park (21.53, Bortle 4), the brightest Banská Bystrica (19.47, Bortle 6). Milky Way season in Banská Bystrica Region runs May to July: on moonless nights the bright core stands clear of the horizon, climbing to about 13° at its highest.
Numbers like 21.95 or 16.97 are the brightness of the sky overhead on a clear, moonless night, in mag/arcsec². The scale runs backwards: a lower number means a brighter sky, from about 22 for a natural sky to about 17 in a city center.
How the readings are made
Darkest skies in Banská Bystrica Region
- Muránska planina National ParkBortle 421.53
- Cerová vrchovina Protected Landscape AreaBortle 421.38
- Low Tatras National ParkBortle 421.37
- Poľana Protected Landscape AreaBortle 421.33
- Štiavnické vrchy Protected Landscape AreaBortle 421.17
Among the places on this site. Plenty of land between them is just as dark, with no town or park to name it by.