Road trip to Seward March 16-18 2004 / Venus pillar I
Poul Jensen

Venus pillar I

Here I accidentally caught a Venus pillar! In principle, any light source shining through a layer of (suitable) ice crystals causes such a pillar, but since the pillar is rather faint, only the brightest light sources will give rise to a visible pillar. I hadn't noticed this one before I saw the photo.