I agree it is a excellent picture. I just couldn't think of what would cause that many spikes. This makes perfect sense. Thanks. -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Rob Ratkowski Photography Sent: Thursday, November 15, 2007 6:30 PM To: Utah Astronomy Subject: RE: [Utah-astronomy] New Comet Image - The tail is essentially gone Tyler those are diffraction spikes off the aperture blades of lens. the number of spikes represent the number of blades in the lens. STILL a nice photo!! aloha Rob _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com