Looks like the dissipated trail from a rocket launch.
As the cloud closer to the camera is still in the light, but that closer to the sun is in the shade, it must be significantly higher at this end than in the distance. Was it taken in California, somewhere east of LA (down range from Vandenberg)?
As the cloud closer to the camera is still in the light, but that closer to the sun is in the shade, it must be significantly higher at this end than in the distance. Was it taken in California, somewhere east of LA (down range from Vandenberg)?