Pluto Energetic Particle Spectrometer Science Investigation
Pluto Energetic Particle Spectrometer Science Investigation ( PEPSSI ) , is an instrument on the "New Horizons" space probe to Pluto and beyond , it is designed to measure ions and electrons . 
<triplet> Pluto Energetic Particle Spectrometer Science Investigation <subj> New Horizons <obj> part of <triplet> New Horizons <subj> Pluto Energetic Particle Spectrometer Science Investigation <obj> has part