Gegenschein and Airglow Doug Zubenel captured this gegenschein in a sky ribbed by banded red airglow generated by hydroxyl radicals ~85 km high. The trails are geosynchronous satellites. The satellites show as trails because the camera was guided on the stars for the exposure. Imaged at the 24th annual Okie-Tex Star Party located in Cimarron County, Oklahoma on the morning of October 10, '07. Canon Digital Rebel XTi (Hutech modified for astrophotography) with a Nikkor fisheye. Image ©Doug Zubenel, shown with permission.