Why Pluto Now Has Five Moons, but It's Still Not a Planet

If ever a spacecraft had the right to turn around and come home, it's NASA's little New Horizons ship. Launched on Jan. 19, 2006, it was dispatched on a mission no other ship had ever dared attempt — fly out and reconnoiter Pluto, the most distant and mysterious planet in the solar system. Little more than seven months later, however — on Aug.