Science Scratching the Surface: Mariner 9 Mission KUAF | By Caitlin Ahrens Published April 19, 2020 at 11:49 AM CDT Facebook Twitter LinkedIn Email Listen • 2:29 On today's installment of Scratching the Surface, Pluto Manager Caitlin Ahrens talks about Mariner 9, the first orbital mission to our planetary neighbor, Mars.