Wayne, I either cropped smaller or it is due to the exposure time. The M12 exposure was 270 minutes versus 180 for M10. Bernard -----Original Message----- From: az-observing-bounce@xxxxxxxxxxxxx [mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Wayne (aka Mr. Galaxy) Sent: Monday, May 16, 2011 2:23 AM To: az-observing@xxxxxxxxxxxxx Subject: [AZ-Observing] Re: Picture of M10 15480 Empire Rd. Benson, AZ 85602 hm ph: 520-586-2244 Hi Barnie, Another great shot! It's curious about the near lack of galaxies in your M10 image compared to that of M12 since they are pretty close to each other on our sky. I agree with Tom that it would be nice to have a side-by-side, same-scale comparison of your globular cluster images. Keep up the wonderful work. Clear skies, Wayne (aka Mr. Galaxy) ---------- Original Message ---------- From: "Bernard Miller" <bgmiller011@xxxxxxx> To: <az-observing@xxxxxxxxxxxxx> Subject: [AZ-Observing] Picture of M10 Date: Wed, 11 May 2011 19:29:34 -0700 Hi, It is globular season so here is one of the several globulars I have been working on. M10 is a globular cluster in the constellation Ophiuchus. It is about 14,000 light years away and has a diameter of about 83 light years. The cluster has a mass of about 225,000 Suns and orbits the Milky Way galaxy every 140 million years. http://www.azstarman.net/M10.htm Barney -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list. -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list. -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.