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Alien comet 3I/ATLAS photographed from Mars carries ice ten times richer in deuterium than ours

When the European Space Agency's ExoMars Trace Gas Orbiter pointed its surface-imaging camera deep into space on October 3, 2025 — the first time any spacecraft orbiting another planet had ever ...
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How Old Is Interstellar Comet 3I/ATLAS? Scientists Think They Finally Might Know the Answer.

New James Webb observations suggest interstellar comet 3I/ATLAS contains ancient ice that may have formed up to 12 billion ...