SwRI’s MAss Spectrometer for Planetary EXploration (MASPEX) instrument aboard NASA’s Europa Clipper spacecraft has a mass resolution fifty times finer than anything that’s flown to space before to study the atmospheric gases and surface materials of Europa. This icy Jovian moon harbors a suspected subsurface ocean with the potential to support microbial life. The advanced capabilities of MASPEX can provide chemical clues on conditions and processes that occur within the depths of Europa.