Crepuscular rays appear to converge on the sun, anticrepuscular rays converge in the opposite direction and you must have your back to the sun or sunset point to see them. Photographer: Ray Boren
Anticrepuscular rays are not rare but they must be sought carefully. When ordinary crepuscular rays are visible, turn around and search for their opposite numbers. More rarely, sunrays pass right across the sky.
The photo above displaying a set of wondrous anticrepuscular rays was taken late last summer while I was driving east across the Great Plains as the Sun was going down behind me. I was traveling on Interstate I-80 in eastern Wyoming – the cloud deck was over the panhandle of Nebraska. The sky behind me, though not cloud free, was clearer than the sky before me.