This image shows Comet PANSTARRS above the city of Bariloche and Mt. Catedral, in Argentina. Guillermo Abramson used a Canon EOS Rebel T1i DSLR with a Canon EF100mm f/2 USM lens. He set the focal ratio at f/2 and selected an ISO of 800. Then he captured this 2.5-second exposure March 3, 2013, at 9:41 p.m. local time.