Summary New Horizons spacecraft is headed to Pluto (the 9th Planet), and will arrive in July 2015 for a quick flyby and some photos and science experiments. Print off a model so you can follow along. These STL files came originally from NASA (http://nasa3d.arc.nasa.gov/detail/new-horizons) and were rotated before uploading for the best print. Instructions STL files as supplied will print extremely small. To get a decent sized model, scale up during slicing. I used 2500% which printed the body about 100mm wide. The body can be printed two ways. Whole or in two parts which can be glued together after printing. Print off the desired parts and superglue together. The antenna is a challenge to print without warping as the reflector is a single layer thick. I suggest using support material and experiment with fan placement until you get it right.