The image shows a clear blue sky with a long, straight trail of white smoke or vapor in the center. The smoke appears to be from an airplane or a jet, as it is trailing behind it in a straight line. The trail is not clearly visible in the image, but it seems to be a contrail or a trail of smoke. The sky is a bright, clear blue and there are no clouds in sight. The image is taken from a low angle, looking up at the smoke trail.