Everyone should wake up in the Southern California desert once in awhile, especially during April. My first word upon waking is "ouch", but after recovering from sleeping on the ground, I can enjoy this type of sight:
The photo shows anti-crepuscular shadows converging on San Gorgonio (the white peak in the distance). It is common to see beams of light while looking toward the rising or setting sun -- these are called crepuscular rays. However, this is the second time I've photographed the anti-crepuscular effect -- e.g., shadows continuing to the vanishing point opposite the sun (also called the anti-solar point). The crepuscular effect comprises light rays, shadows or both. In the above photo, the ray would be the larger area between the shadows, but I can hardly call that a ray. Rather, I see only the anti-crepuscular shadows. I suspect that the conditions necessary to create the appearance of smaller light rays against a darker background are more rare than this.
I use this blog as a companion to my website www.brightstarstemeculavalley.org, where I call attention to local light pollution and share my enthusiasm for science and astronomy. I'm also a contributor to www.SkepticalScience.com.