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Interstellar Comet 3I/ATLAS Prompts First-Ever Planetary Defense Drill

3I/ATLAS exhibits a unique sunward tail and metal alloy emissions with no natural precedent, and Harvard's Avi Loeb estimates it lost 2 million tons of mass since July.

  • A planetary defense group led by NASA is tracking interstellar comet 3I/ATLAS, identified as a threat due to its unusual behavior, including an anti-tail and non-standard material emissions.
  • Dr. Avi Loeb speculated that 3I/ATLAS may resemble an alien probe due to its abnormal traits.
  • The International Asteroid Warning Network plans to conduct a two-month observation campaign for 3I/ATLAS from November 27, 2025, to January 27, 2026.
  • Research confirms that 3I/ATLAS is emitting a metal alloy never seen in comets, specifically nickel tetracarbonyl, which has only been associated with human manufacturing.
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An interstellar object crosses the solar system and produces an unprecedented natural phenomenon.It is the comet 3I/ATLAS, whose composition surprises scientists by generating a metallic compound that, until now, was only known through industrial processes carried out by the human being.The most recent images, taken from the Keck II telescope in Hawaii, show that this comet emits pure nickel without iron, a characteristic that had not been recor…

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NASA (Source) broke the news in Washington, United States on Wednesday, July 2, 2025.
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