YozoraAtlasyo·zo·ra (夜空) n. [Jap.] night sky

How dark is the sky in Tasmania?

Sky darkness for 17 towns and parks in Tasmania, worked out from NASA satellite images of light at night (2025). 13 of them have skies of Bortle 4 or darker, where the Milky Way shows overhead. The darkest is Mount William National Park (21.94, Bortle 2), the brightest Hobart (18.70, Bortle 7). Milky Way season in Tasmania runs February to October: on moonless nights the bright core stands clear of the horizon, climbing to about 78° 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 Tasmania with every place marked

Darkest skies in Tasmania

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 Tasmania

All 17 places in Tasmania

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

Burnie6 Cradle Mountain-Lake St Clair National Park2 Devonport6 Douglas-Apsley National Park2 Franklin-Gordon Wild Rivers National Park2 Freycinet National Park2 Hartz Mountains National Park3 Hobart7 Launceston6 Maria Island National Park3 Mole Creek Karst National Park3 Mount Field National Park3 Mount William National Park2 Narawntapu National Park4 Southwest National Park2 Tasman National Park3 Walls of Jerusalem National Park2