On Wednesday, NASA received the first close-up photos of Pluto from the New Horizons probe that completed an incredible nine-year, three-billion-mile journey to the remote dwarf planet. The images are both stunning and informative; the surface reveals mountains of ice as tall as 11,000 feet, and a lack of impact craters means the surface is relatively young — less than 100 million years old. NASA also released photos of two of Pluto's moons, Charon and Hydra — though one is a tad...