WebJan 19, 2006 · New Horizons is a NASA mission to study the dwarf planet Pluto, its moons, and other objects in the Kuiper Belt, a region of the solar system that extends from about 30 AU, near the orbit of Neptune, to about 50 AU from the Sun. It was the first mission in NASA’s New Frontiers program, a medium-class, competitively selected, and principal ...