Hi Dave, it looks more like the smoke trail of a rocket launch to me. It's quite odd. Thanks, Joe ________________________________ From: Dave Gary <davegary@me.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Monday, July 29, 2013 11:11 PM Subject: [Utah-astronomy] Shadow of Contrail From Whispering Oaks Lodge-Near Moab, Utah Have any of you seen this effect before. This is a photo of the shadow of a contrail you could see from the porch of Whispering Oaks Lodge near Moab, Utah on the morning of July 27th. The shadow of the contrail was very prominent. I’ve never seen this effect before and thought it was very interesting. The shadow lasted about 20 minutes and became wider and more turbulent-looking as the contrail broke up. http://www.flickr.com/photos/78046474@N06/9396674461/ _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".