Year of the Comet
Comet C/2011 L4 (PANSTARRS)

PANSTARRS information

Comet C/2012 S1 (ISON)

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Stephen James O'Meara's Secret Sky

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.
Contributed by Stephen James O'Meara
Published: July 27, 2009
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.
Photo by 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.
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