Good morning Albert, Arizona Observers, and many others who love Astro Photography (in bcc) re: After the sky cleared at the antennas [observing site in Arizona] last night, I took one hour of 60 second shots with my Canon 60 DA and stacked them tonight with software called StarStax, free on the internet. Here is a link to StarStax: http://www.markus-enzweiler.de/StarStaX/StarStaX.html Your gallery of many astro images at: http://www.flickr.com/photos/49526053@N04/8626153773/in/photostream/lightbox/ is wonderful. This sunset in Arizona is beautiful: http://www.flickr.com/photos/49526053@N04/8422419088/in/photostream/lightbox/ The Arizona Observers Archive is at: //www.freelists.org/archive/az-observing your original message is at: //www.freelists.org/post/az-observing/Star-Trails I look forward to enjoying your future images Great work Many thanks !! Victor Dr. Eng. Victor Herrero-Arrieta Ph.D. M.S. Ing.Ind. http://herrero-radio-astronomy.blogspot.com/view/magazine Radio Astronomy Blog https://groups.google.com/d/forum/victor-herrero-radio-astronomy Messages https://groups.google.com/forum/?hl=es&fromgroups#!forum/red-radioastronomia-en-espanol http://herrero-victor.blogspot.com/ Astronomy Blog http://victorstravelpictures.blogspot.com/ Travel pictures -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.