Astronomers Discover Major Clue About 3I/ATLAS’ Origins
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2 min readKey summary
ALMA observations of interstellar object 3I/ATLAS detected water vapor and an unusually high deuterium ratio.
The chemistry suggests it likely formed in a cold, low-radiation region far from its parent star, deep in the Milky Way.
That makes 3I/ATLAS a rare clue to the birthplace of an object from beyond our solar system.
The finding helps scientists compare how planetary systems and comet-like bodies form across the galaxy.
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