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Sam Miller The SaddleBrooke Skygazers Astronomy Club is pleased to host Dr. David Iadevaia, a professor of astronomy and physics at Pima College, on Sunday, Feb. 18, at the DesertView Performing Arts Center, 39900 S. Clubhouse Drive, at 7 p.m. In this talk, Professor Iadevaia will discuss slitless spectroscopy and how to collect useful astronomical…