Pluto Energetic Particle Spectrometer Science Investigation
来自维基百科，自由的百科全书
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離子質譜儀（英语：Pluto_Energetic_Particle_Spectrometer_Science_Investigation）（Pluto Energetic Particle Spectrometer Science Investigation, PEPSI）是用來測量冥王星陽離子與中性粒子組成、同位素組成等的裝置。從