![September 2009 circumhorizon arc](https://www.astronomy.com/wp-content/uploads/sites/2/2023/02/sept-2009-circumhorizon-arc.jpg)
Tunç Tezel captured this arc display in 2005. Ice crystals had to align just right in the atmosphere while the Full Moon sat at 65° altitude.
Tunç Tezel
Once again, thank you to everyone who has e-mailed me with observations. I’ve enjoyed reading them all and plan to devote future columns to some of the topics. Until then, I’d like to share with you a few interesting reader reports.