March 09, 2014
Photographer: Luc Perot; Luc's Web site
Summary Authors: Luc Perot; Jim Foster
The photo above shows a wonderful display of anticrepuscular rays as observed from Reunion Island on the evening of January 15, 2014. The nearly full Moon is rising amidst the rosy rays, with the Belt of Venus. Anticrepuscular rays are simply an extension of crepuscular rays. If the air is sufficiently clean and clear and the crepuscular rays sufficiently distinct, rays can be seen fanning out on both sides of the sky -- on opposite horizons. In actuality, the lanes of light and shadow are parallel to each other; perspective makes them appear otherwise.