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A demonstration model of the Mass Spectrometer observing lunar operations, or MSolo, is seen Great American State Fair as visitors view NASA exhibits in the American Innovation Pavilion, Wednesday, July 8, 2026, on the National Mall in Washington, D.C. MSolo is a modified commercial off-the-shelf mass spectrometer developed at NASA’s Kennedy Space Center to analyze the chemical makeup of the Moon’s surface. Photo Credit: (NASA/Joel Kowsky)