YozoraAtlas

How dark is the sky in Central Greece?

Sky darkness for 6 towns and parks in Central Greece, 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 Parnassos National Park (21.30, Bortle 4), the brightest Lamia (19.16, Bortle 6). Milky Way season in Central Greece runs March to September: on moonless nights the bright core stands clear of the horizon, climbing to about 23° 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 Central Greece with every place marked

Darkest skies in Central Greece

  1. Parnassos National ParkBortle 421.30
  2. Oiti National ParkBortle 421.16

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 Central Greece

  1. LamiaBortle 619.16
  2. ChalkidaBortle 619.44
  3. ThebesBortle 519.62
  4. LivadeiaBortle 519.99

All 6 places in Central Greece

Amber names are parks and certified dark-sky places. The figure is the Bortle class: 1 darkest, 9 city center.
Chalkida6Lamia6Livadeia5Oiti National Park4Parnassos National Park4Thebes5