YozoraAtlas

How dark is the sky in Marche?

Sky darkness for 5 towns and parks in Marche, 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 Sibillini Mountains National Park (21.13, Bortle 4), the brightest Ancona (18.85, Bortle 7). Milky Way season in Marche runs April to August: on moonless nights the bright core stands clear of the horizon, climbing to about 18° 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 Marche with every place marked

Darkest skies in Marche

  1. Sibillini Mountains National ParkBortle 421.13
  2. Gola della Rossa and Frasassi Regional ParkBortle 420.70

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 Marche

  1. AnconaBortle 718.85
  2. PesaroBortle 619.16
  3. FanoBortle 619.42

All 5 places in Marche

Amber names are parks and certified dark-sky places. The figure is the Bortle class: 1 darkest, 9 city center.
Ancona7Fano6Gola della Rossa and Frasassi Regional Park4Pesaro6Sibillini Mountains National Park4