In late 2013, I wrote about the NASA spacecraft New Horizons making its final journey to the dwarf planet Pluto. I focused on how its instruments can be used to prove that Pluto is, in fact, not a planet, despite protestations from the public and the scientific community. Here, I wrote for an interested, but not attentive audience. I wrote this article as if it would appear in Popular Science or some other scientifically-oriented magazine. This gives interested readers a chance to learn about complex system, the spacecraft, and how its instruments can be used to finally prove that Pluto is not a planet.