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An SwRI-led team detected carbon dioxide and hydrogen peroxide spectral signatures on Pluto’s largest moon Charon using Webb telescope observations , which extend the wavelength coverage of previous New Horizons flyby measurements . Credit: SwRI
Webb spectroscopic measurements revealed signatures of carbon dioxide, which the team compared with laboratory measurements and detailed spectral models of the surface. They concluded that carbon dioxide is present primarily as a surface veneer on a subsurface rich in water ice. As Dr. Protopapa explained in a recent SwRI
“Our preferred interpretation is that the upper layer of carbon dioxide originates from the interior and has been exposed to the surface through cratering events. Carbon dioxide is known to be present in regions of the protoplanetary disk from which the Pluto system formed.”Hydrogen peroxide forms when water ice is broken down at the atomic level through exposure to ultraviolet light, charged particles from the Sun , and galactic cosmic rays.
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