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Interstellar Comet 3I/ATLAS: Evidence for Galactic Cosmic Ray Processing - Astrobiology

Summary by astrobiology.com
Spectral observations of 3I/ATLAS (C/2025 N1) with JWST/NIRSpec and SPHEREx reveal an extreme CO2 enrichment (CO2/H2O = 7.6+-0.3) that is 4.5 sigma above solar system comet trends and among the highest ever recorded. This unprecedented composition, combined with substantial absolute CO levels (CO/H2O = 1.65+-0.09) and red spectral slopes, provides direct evidence for galactic cosmic […] The post Interstellar Comet 3I/ATLAS: Evidence for Galactic…
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astrobiology.com broke the news in on Monday, November 3, 2025.
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