Kenneth G. Smith shot this photo of anticrepuscular rays in the eastern sky over Texas at sunset. He wrote:
They kept changing like an aurora borealis until the sun fully set.
Anticrepuscular rays have the same source as crepuscular rays, sometimes called sunrays. We’ve all seen sunrays converging on the sun, columns of sunlight streaming up from the horizon or down through gaps in clouds. If your sky is extremely clear and pure, you might also see those rays converging towards the point on the sky opposite the sun. Here’s more about anticrepuscular rays.
Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. Today, as Lead Editor at EarthSky.org, she helps present the science and nature stories and photos you enjoy. She also serves as one of the voices of EarthSky on social media platforms including Facebook, Twitter and G+. She and her husband live in Tennessee and have two grown sons.