For decades, Pluto remained one of the most mysterious objects in our solar system, until July 14, 2015, when NASA's New Horizons spacecraft became the first mission to visit it up close, capturing breathtaking images of the distant world. It took over nine years for New Horizons to reach Pluto after blasting off atop an Atlas 5 rocket on Jan. 19, 2006. After traveling billions of miles through the solar system, New Horizons sent home stunning images of Pluto and its moons, making headlines