JWST detection of a carbon dioxide dominated gas coma surrounding interstellar object 3I/ATLAS

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Interstellar Comet Rich in Carbon Dioxide Hints at Different Formation Conditions

Observations of interstellar object 3I/ATLAS using the James Webb Space Telescope reveal a coma rich in carbon dioxide, with a CO 2 /H 2 O ratio much higher than typical Solar System comets. This might indicate a different formation environment for 3I/ATLAS, potentially in a CO 2 -rich region of its parent protoplanetary disk or in a low metallicity environment.

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This is a significant observation in a newly emerging area of planetary science, and helps constrain models of planet formation.

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