YozoraAtlas

How dark is the sky in Trenčín Region?

Sky darkness for 8 towns and parks in Trenčín Region, worked out from NASA satellite images of light at night (2025). 3 of them have skies of Bortle 4 or darker, where the Milky Way shows overhead. The darkest is Ponitrie Protected Landscape Area (21.26, Bortle 4), the brightest Trenčín (19.38, Bortle 6). Milky Way season in Trenčín Region runs June: on moonless nights the bright core stands clear of the horizon, climbing to about 12° at its highest.

19 Bortle class, 1 pristine to 9 city center park or dark-sky place city

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

NASA satellite night-lights map of Trenčín Region with every place marked

Darkest skies in Trenčín Region

Among the places on this site. Plenty of land between them is just as dark, with no town or park to name it by.

Brightest city skies in Trenčín Region

All 8 places in Trenčín Region

Amber names are parks and certified dark-sky places. The figure is the Bortle class: 1 darkest, 9 city center.

Biele Karpaty Protected Landscape Area4 Dubnica nad Váhom5 Partizánske5 Ponitrie Protected Landscape Area4 Považská Bystrica5 Prievidza5 Strážov Mountains Protected Landscape Area4 Trenčín6