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

Gemini Sparkle

Key Takeaways:

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.