When NASA's New Horizons spacecraft flew past Pluto in 2015, researchers hoped that its data would help them unravel some of the dwarf planet's mysteries. Instead, the discoveries made during the close-up look at Pluto and its moon Charon revealed more questions that needed answering.


원문출처 : https://www.cnn.com/2019/05/20/world/pluto-ocean-insulation-scn/index.html