Wanderlust World Wanderlust World The ethereal glow known as airglow (or nightglow) is a faint emission of light in Earth's upper atmosphere, visible from dark-sky locations around the globe. While Adelaide, Australia, is famous for its airglow sightings, the phenomenon is by no means exclusive to that city. Here are several other locations where observers have documented vivid airglow displays.
Deep in the Northern Territory's desert, Alice Springs boasts exceptionally clear, dark skies. Airglow often appears as a subtle greenish band along the horizon.
This outback mining town in New South Wales offers pristine night skies. Observers frequently report pink or purple airglow hues.
On the South Island, with the Southern Alps as a backdrop, Christchurch witnesses greenish-blue airglow on clear nights.
Known for its Victorian architecture and Scottish heritage, Dunedin's dark skies reveal a silvery-white airglow.
Tasmania's capital, with its historic waterfront and nearby wilderness, often shows a golden-orange airglow.
Despite being a major metropolis, Melbourne's outer suburbs and nearby dark-sky sites record pinkish-red airglow.
Even near Australia's largest city, dark pockets like the Blue Mountains allow sightings of greenish-blue airglow.
Airglow results from chemical reactions in the upper atmosphere (80–300 km altitude), where solar radiation ionizes atoms and molecules. When these particles recombine, they release photons, creating a faint, colorful glow. Unlike auroras, airglow occurs globally and continuously, though it's only visible under very dark skies.
Airglow is a global phenomenon—anywhere with truly dark skies can reveal it. The cities listed above are simply well-documented spots where observers have captured striking examples.