Kansas Airglow Another all-sky image by Doug Zubenel taken August 13, 2001 shortly after local midnight, Lincoln County, Kansas, USA. Airglow is usually brightest 10-15° from the horizon as here. It is banded by gravity waves rising up through the mesosphere into the lower thermosphere. The yellow at 2 o'clock is the light from Kansas City about 60 miles away.    Image ©Doug Zubenel, shown with permission.