After 3 billion miles and nearly 10 years on the road, NASA’s New Horizons spacecraft will fly by dwarf planet Pluto in July. Until then, the spacecraft is zooming ever closer to the frosty world and its five known moons, covering nearly a million miles each day.

Set for July 14, the flyby promises to be an epic final chapter in the first reconnaissance of the classical solar system. So far, we’ve been to all the other planets and several of the enigmatic worlds strewn in the space between. But we haven’t yet visited the former ninth planet or any of its siblings on the fringe of the easily observable solar system. Pluto represents a new type of world,