3I/ATLAS: A Methanol-Rich Interstellar Object Revealing Clues About Alien Worlds

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Interstellar comet 3I/ATLAS, spotted in July 2025 with the ALMA telescope, shows unusually high methanol in its coma and hydrogen cyanide mainly from the nucleus, with methanol released from both the nucleus and icy grains—a first for an interstellar object—hinting it formed in colder conditions or with a chemical makeup different from solar-system comets, while its tail emits X-rays from solar wind interactions; it is the third known interstellar visitor after Oumuamua and Borisov, and Nathan Roth says observing it is like taking a fingerprint from another solar system, offering a rare glimpse into the building blocks of distant planets.

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Comet 3I/ATLAS puzzles scientists, revealing secrets of alien worlds
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Comet 3I/ATLAS puzzles scientists, revealing secrets of alien worlds

A visitor from another star system is creating excitement in the astronomy community. The comet 3I/ATLAS which was first spotted in July 2025 contains chemical clues that scientists can use to study...