When the New Horizons mission conducted the closest flyby of Pluto and its moon, Charon, in 2015, images provided a zoomed-in view of their pockmarked surfaces. The scars are ancient impact craters that were created 4 billion years ago.
원문출처 : https://www.cnn.com/2019/02/28/world/pluto-charon-kuiper-belt-study-scn/index.html
원문출처 : https://www.cnn.com/2019/02/28/world/pluto-charon-kuiper-belt-study-scn/index.html