Airglow over Sweden

Airglow is the light of excited atoms, high in Earth’s atmosphere.

View larger. | Photo by Stefan Nilsson (

View larger and higher quality. | Photo by Stefan Nilsson (known on Facebook as

Stefan Nilsson in Ă…hus, Sweden wrote:

Airglow glowing in the darkness.

To enjoy the image in its full glory, please follow the 500px-link.

Thank you, Stefan!

Read what Atmospheric Optics has to say about airglow

Or read the airglow entry on Wikipedia.

Deborah Byrd