Featured Photo
Crepuscular rays or "God rays" are sunbeams that originate when the sun is below the horizon, during twilight hours. Crepuscular rays are noticeable when the contrast between light and dark are most obvious. Crepuscular comes from the Latin word "crepusculum", meaning twilight.
Photo by Luis Argerich. Flickr image, Attribution 2.0 Generic (CC by 2.0)
This is a freely licensed work, as explained in the Definition of Free Cultural Works."
Date accessed: 3/22/2012
Crespuscular & Anti-Crespuscular Rays
- Atmospheric OpticsA commercial website, this offers information on optical phenomena such as anticrepuscular rays, fogbows, and Brocken Spectres/Glories.
- Crepuscular Rays Seen From SpaceUniverseToday.com, by Nancy Atkinson on October 31, 2011
- Astrophoto: Double Crepuscular RaysUniverseToday.com, by Nancy Atkinson on June 10, 2012
- Anti-Crepuscular RaysA commercial website, this offers information on a number of lesser known optical phenomena such as anticrepuscular rays, fogbows, and Brocken Spectres/Glories.
- How to see anticrepuscular raysEarthSky // Earth, Science Wire Release Date: Jul 07, 2015