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About

Ernesto Diaz is a leading figure in planetary science and instrumentation, renowned for his pivotal role in advancing in-situ geochemical analysis on extraterrestrial surfaces. His primary research focuses on developing and deploying X-ray fluorescence spectrometers for planetary exploration, with a major contribution being his work on the PIXL instrument (Planetary Instrument for X-Ray Lithochemistry). As a key architect of PIXL, which flew aboard NASA’s Perseverance rover to Mars, Diaz helped revolutionize how scientists map elemental composition at microscopic scales—enabling the detection of biosignatures and past habitable environments. His most-cited paper, "PIXL: Planetary Instrument for X-Ray Lithochemistry" (2020), has garnered 135 citations, reflecting its foundational impact on the field. Beyond this flagship achievement, Diaz has contributed to the calibration and data interpretation for multiple Mars missions, bridging engineering and geology. His work has not only advanced our understanding of Martian geology but also set new standards for robotic planetary exploration. For students and researchers, Diaz exemplifies how precision instrumentation can unlock the secrets of other worlds.