Luxel built thin carbon and aluminum filters for the Pluto Energetic Particle Spectrometer Science Investigation (PEPSSI), the most compact and lowest energy particle spectrometer ever flown. The instrument weighs only 1.5 kilograms. It will take over a year to download all the data collected during New Horizon’s intensive 22-hour flyby, but preliminary results have already been rewarding. Not only have we seen the highest resolution photos ever taken of Pluto, it appears the spacecraft may have arrived just in time to study the atmosphere. With a measured surface pressure 100,000 times less than Earth, a huge decrease from the previous measurement indicating that Pluto’s atmosphere may be collapsing. The fact that Pluto’s atmosphere is in such a state of flux will make the observations from PEPSSI even more fascinating to follow.