Comet ISON: "NASA's Deep Impact Spacecraft Eyes Comet ISON" 2013 NASA JPL,Tech,,more at http://scitech.quickfound.net/ Public domain film from NASA - Jet Propulsion Laboratory. Silent. http://www.jpl.nasa.gov/news/news.php?release=2013-047 PASADENA, Calif. - NASA's Deep Impact spacecraft has