YozoraAtlas

How dark is the sky in Littoral-Inner Carniola?

Sky darkness for 2 towns and parks in Littoral-Inner Carniola, worked out from NASA satellite images of light at night (2025). 2 of them have skies of Bortle 4 or darker, where the Milky Way shows overhead. The darkest is Planina Polje Landscape Park (21.11, Bortle 4), the brightest Planina Polje Landscape Park (21.11, Bortle 4). Milky Way season in Littoral-Inner Carniola runs April to July: on moonless nights the bright core stands clear of the horizon, climbing to about 15° 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 Littoral-Inner Carniola with every place marked

Darkest skies in Littoral-Inner Carniola

  1. Planina Polje Landscape ParkBortle 421.11
  2. Rakov Škocjan Landscape ParkBortle 421.11

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

All 2 places in Littoral-Inner Carniola

Amber names are parks and certified dark-sky places. The figure is the Bortle class: 1 darkest, 9 city center.
Planina Polje Landscape Park4Rakov Škocjan Landscape Park4