From the July 2009 issue

Stephen James O’Meara’s Secret Sky: Readers report 2009

September 2009: From ice crystals to a cluster's heart, I've read about some interesting observations.
By | Published: July 27, 2009 | Last updated on May 18, 2023
September 2009 circumhorizon arc
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.