Loeb paper asks whether interstellar object 3I/ATLAS could be alien technology

When
Deep telescope image of interstellar comet 3I/ATLAS
Interstellar comet 3I/ATLAS, the subject of Loeb's 2025 paper International Gemini Observatory/NOIRLab/NSF/AURA/B. Bolin, CC BY 4.0, via Wikimedia Commons

Weeks after the interstellar object 3I/ATLAS was found, Avi Loeb and two co-authors posted a non-peer-reviewed paper asking whether it could be alien technology. NASA describes it as a comet, and astronomers quoted in the press said the evidence points to a natural object.

Sources

  1. OfficialComet 3I/ATLAS (opens in a new tab)NASA Science
  2. FirsthandIs the Interstellar Object 3I/ATLAS Alien Technology? (arXiv:2507.12213) (opens in a new tab)arXiv (Hibberd, Crowl and Loeb) / 2025-07-16
  3. PressHere we go again! Controversial paper questions whether interstellar visitor 3I/ATLAS is 'possibly hostile' alien tech in disguise (opens in a new tab)Live Science / 2025-07-22

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