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Older than the sun: Astronomers find new clues to the origin of interstellar comet 3I/ATLAS

Astronomers have used the European Southern Observatory's Very Large Telescope (ESO's VLT) to study the composition of 3I/ATLAS, the brightest interstellar object ever seen, in detail. By measuring specific chemical fingerprints—the first observations of this kind for a comet that formed outside the solar system—they found that 3I/ATLAS likely originated in the outskirts of an old star system.

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