In 2013 and again in 2014 I attended the Advanced Imaging Workshop
run by Adam Block of the Mt Lemmon Sky Center (part of the
University of Arizona, Tucson campus;
http://skycenter.arizona.edu/). This gallery provides a review of
the experience including scenes form the mountain and from the...
Astrophotography by Rex A Parker PhD from New Jersey USA (home astronomy observatory); or from Cerro Tololo Chile (Star Shadows Remote Observatory, CTIO, PROMPT2/UNC-Chapel Hill); or Mt Lemmon Sky Cntr, AZ USA (thanks to A Block).