A Comet Carrying Someone Else's Recipe for Water
…the water boiling off the comet as it nears the Sun carries a deuterium-to-hydrogen ratio of…
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The Rundown — September 23, 2026
…interstellar object 3I/ATLAS's water carries a deuterium-to-hydrogen ratio of about 1%, tens of times…
Article ·Twice the Mass of Jupiter, and a Problem for How Stars Form
…below that, an object can't even fuse deuterium (a heavier form of hydrogen), and by convention it…
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