YozoraAtlas

How dark is the sky in Friuli Venezia Giulia?

Sky darkness for 4 towns and parks in Friuli Venezia Giulia, 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 Friulian Dolomites Nature Park (21.36, Bortle 4), the brightest Trieste (18.56, Bortle 7). Milky Way season in Friuli Venezia Giulia 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 Friuli Venezia Giulia with every place marked

Darkest skies in Friuli Venezia Giulia

  1. Friulian Dolomites Nature ParkBortle 421.36
  2. Julian Prealps Nature ParkBortle 421.30

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 Friuli Venezia Giulia

  1. TriesteBortle 718.56
  2. UdineBortle 619.23

All 4 places in Friuli Venezia Giulia

Amber names are parks and certified dark-sky places. The figure is the Bortle class: 1 darkest, 9 city center.
Friulian Dolomites Nature Park4Julian Prealps Nature Park4Trieste7Udine6