Astronomers Just Confirmed the Presence of Carbon Dioxide On Pluto's Moon Charon - Where Did it Come From?
Briefly

The detection of carbon dioxide was a satisfying confirmation of our expectations; our analysis demonstrates that the surface of Charon preserves records from both formation and irradiation processes.
The special instrument on JWST found evidence that Charon contains hydrogen peroxide, likely formed as the Sun sprayed energetic particles onto Charon's ice-rich surface.
Read at Inverse
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