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New Revelations About the Origin of Interstellar Comet 3I/ATLAS

Webb and ALMA found methane, methanol and unusually high carbon dioxide, offering the first chemical profile of an interstellar comet.

  • Recently, NASA's James Webb Space Telescope captured the first mid-infrared chemical fingerprint of interstellar comet 3I/ATLAS, providing new insights into the visitor's composition as it traveled away from the Sun.
  • As only the third interstellar object ever observed, 3I/ATLAS offers scientists a rare opportunity to study material that formed in another planetary system without leaving Earth.
  • "Observing 3I/ATLAS is like taking a fingerprint from another solar system," said Nathan Roth, an American University professor, noting the comet contains an unusually high amount of methanol.
  • Measurements of dinitrogen gas relative to carbon monoxide suggest 3I/ATLAS formed in conditions colder than-400°F, indicating it likely originated in the far reaches of its home star system.
  • Studying such interstellar visitors helps astronomers understand how planets form around other stars, with findings recently published in The Astrophysical Journal Letters adding new insights to this research.
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For weeks, Comet 3I/Atlas has captivated the imaginations of astronomy enthusiasts and kept scientists awake at night. Now, thanks to a remarkable study, one of the secrets of this extraordinary object has been solved.

New study on the chemical analysis of the gas coma of 3I/Atlas: The study suggests that the first third interstellar comet discovered in the history of humanity must have been created in a very cold environment. read more on t3n.de

New analyses reveal details about the origin of the comet coming from another solar system, 3I/Atlas. An unprecedented chance to observe an object coming from a very different environment than everything we know around us.

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Science Daily broke the news in Encinitas, United States on Tuesday, September 8, 2026.
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