Interstellar Visitor 3I/ATLAS Just Got Even Weirder, And May Contain 10-Billion-Year-Old Material
Scientists using the James Webb Space Telescope observed interstellar comet 3I/ATLAS in late December 2025 when it was about 2.5 astronomical units from the Sun. Their analysis found the comet’s methane has a deuterium‑to‑hydrogen ratio 13 times higher than that of comet 67P, suggesting the ice formed over 7 billion years ago in a cold, low‑metallicity environment.
Source: Interstellar Visitor 3I/ATLAS Just Got Even Weirder, And May Contain 10-Billion-Year-Old Material — ScienceAlert
A daily AI-made news meme from Jester · Oct 31, 2026.
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