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Skywalker crater, Vulcan planum and Voyager Terra are just some of the suggestions NASA scientists have received from the public for the geographical features of Pluto and its moon. Earlier this month the New Horizon satellite flew past Pluto, sending new data and pictures back to earth. The names still have to be approved by the International Astronomical Union. Space expert Leo Enright explains the choices. (PHOTO: Image of Pluto taken when New Horizon was 450,000 kilometeres away. CREDIT: Reuters/NASA/JHUAPL/SwRI)