Photographer captures ghostly ripples over Colorado night sky. 'It is rare to see it directly overhead and moving like that' (photo)

Ghostly green ripples can be seen in the hazy green airglow above. (Image credit: Aaron Watson/Skies Alive Photography)

Beneath the star-drenched skies of Colorado on May 26, as the Milky Way arched into view, photographer Aaron Watson pointed his lens upward — and captured something extraordinary unfolding in the night.

"I have seen airglow a lot, but it is rare to see it directly overhead and moving like that," Watson told Space.com in an email.