The natural phenomenon of light pillars in the night sky above Peterborough Ontario, captured just before 2am by photographer Jay Callaghan.
It’s caused by the reflection of light (in this case, moonlight) from ice crystals with near horizontal parallel planar surfaces.
But you knew that.
Below: the night sky above Laramie, Wyoming by Christoph Geisler, Fort Wainwright, Alaska by Joey Holliday. and a sun pillar in San Francisco [Wikimedia Commons])