I'm not sure. I've seen it in other photos of globular clusters, too. One reason may be that in order to show anything other than a big glare, the brightness had to be adjusted. Possibly the bright stars that remained somehow influenced the color balance to make the dimmer ones look blue. If someone else knows, I'd like to hear. Thanks, Joe --- On Thu, 6/11/09, M Wilson <astro_outwest@yahoo.com> wrote: From: M Wilson <astro_outwest@yahoo.com> Subject: Re: [Utah-astronomy] M22, Part 2 To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Thursday, June 11, 2009, 8:49 AM Great writing and article, Joe. I have a question though. M22 and other globulars are supposed to be populated with old aged red stars, but your photo, and many (but not all) others I've seen on the Internet, indicates that the colors of those stars to be blue. Is there an explanation for this? --- On Wed, 6/10/09, Joe Bauman <josephmbauman@yahoo.com> wrote: From: Joe Bauman <josephmbauman@yahoo.com> Subject: [Utah-astronomy] M22, Part 2 To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Wednesday, June 10, 2009, 11:31 PM Hi Friends, Here's the second, and for now, last, part of my M22 epic. http://www.deseretnews.com/blogs/1,5322,10000034,00.html?bD=20090610 Thanks, Joe _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php Visit the Wiki: http://www.utahastronomy.com